What do you mean by malfunction? what happens?

I do believe this is intended behaviour for bedrock edition on Minecraft. Check this link out and it will tell you all about what the observer can and can not detect. It shows that bedrock edition observers will not detect changes from the stem. https://minecraft.gamepedia.com/Observer

I doubt it is because of the amount of entities, tnt will only break roughly a maximum of 100 blocks per explosion and those 100 blocks will stack up to also prevent lag, another reason I doubt it is because of lag is because take mob eggs for an example you can spawn as many mobs in as you like in till the entire game is down to single FPS digits, the same rule would apply for TNT it’s upto you whether you use it and choose to make your game lag 

I did believe this was portended behaviour, I do hope this gets a big fix ASAP. Because it is a huge game changer for anytime of redstone farm

Out of curiosity the friends you have on Xbox do they also run into this issue on realms aswell? I myself have my own realm and have been running into the same exact issue as you are describing, I have a 4x4 sand door and I find every time our realm decides on timing out I come back and the door has locked up and the redstone is broke and the only way to sort it is by breaking every piece of redstone one by one and replacing it, seems to be the only thing that will update the realm 

Don’t understand what the issue is? The block gets powered by the redstone torch underneath and the piston that should push the block gets powered at the incorrect time. You are powering the second piston every time before the first and that’s what causes the second piston to extend blocking the first pistion from pushing the block for you 

After doing some more research i understand now why this is intended behaviour, thanks for the help and sorry abut thinking this was a bug. If you ever get a chance could you please check out a report i posted on tuesday called "Hoppers not sucking items correctly" it is all about how a hopper will only hold 64 items if connected into a chest. Here is the link if you ever get a quick chance to have a look, thanks for all the help 🙂 https://bugs.mojang.com/projects/MCPE/issues/MCPE-35132?filter=allopenissues

But if the one the right only moved 1 item a second the 64 items inside the hopper on the right would have roughly taken 64 seconds but it didn’t it only took around 20 seconds.

I don’t understand though because you are saying this a duplicate but that post you are referring to is nearly a year old and shows that it is a bug but if it is a bug why has it not been patched yet?

I don’t think this is intended behaviour because if it was wouldn’t  the Redstone dust show being connected into the block and the piston? 

I was just wondering if any updates about this bug have been found

 What i have done is run 2 tests on bedrock edition and 2 tests on java edition and my results are... 

Java = 1105

Java = 1101

Bedrock = 738

Bedrock = 670 

I have posted a very quick 9 second video clip just so i could show you how i ran the tests, the reason for me running the tests like this is because it is hopefully the easiest way i can show you the difference between bedrock edition mining and java's. All you gotta do is just mine like i did in the video for 1 minute and then just go around the massive hole you would have dug by then and collect the results. You don't even need to do the test for a minute just 20 or 30 seconds and times whatever number you have by 3 or 2. I can guarantee though before you have even done both tests the second you switch from bedrock into java edition or vice versa you will instantly feel the speed difference between both versions if you test it the same way as i did. I am also posting a link to a youtuber i watch quite frequently, the video is about a high efficiency stone generator which was created in java edition and the stone generator make 72000 stone hr which if you divide by 60 is 1200 stone a minute. This is purely here so i can prove that you can mine up to 1200 stone per minute on java edition i do hope this information helps 🙂  https://www.youtube.com/watch?v=G2P3dnZH9s8&t=302s

From what i can guess is because you are running and mining at the same time you are mining much quicker then you can run and there for constantly playing catch up meaning you won't hit the max numbers i have given to you. What i will do is tomorrow is do the same test you did and give you my results and do the same test i used for my results last time and then give you an update. What i would suggest doing is mining and going left or right for a minute because that is how i ran my test. I mined smooth sandstone on a super flat world and just kept going sideways while doing it so it means you constantly are breaking blocks. 

thank you

Sorry for the late reply, What i have done is post a couple of screenshots one from xbox one edition (java) the other from bedrock edition. These screenshots are from me running exactly one minute tests and as you can see on bedrock edition i ran around 750 blocks in exactly one minute and on java edition i ran over 1000 blocks and would have been more but kept on hitting air blocks On java edition. you can mine around 1200 blocks a minute on java and on bedrock it seems the max you can mine is 750 give or take. What i have done is taken two videos one from java and the other from bedrock and both these videos show exactly 1 minute of mining with haste 2 efficiency 5 diamond pick. Unfortunately i cannot post these videos because they are over 10mb 😞 but just wanna say that i have ran both of these tests several times and every time bedrock edition results is around 750 and on java anywhere from 1100 all the way to round 1200. If you are wondering how i ran these tests all i did was mine a smooth sandstone world for exactly one minute with the pickaxe and then collected the results. This proves that mining on bedrock is a lot slower then mining on java edition. Thank you again for replying and i am sorry again for it taking me so long to get back in touch 🙂

Believe he does mean the bedrock edition for xbox one as the same happens for me on xbox one bedrock

Unfortunately this is not a bug it is because minecraft on the bedrock edition does not support quasi connectivity and so the repeater can not power the piston below. .

Yeah i know it has broken a LOT of my redstone projects as well, I believe you move pretty much every block in the game with a piston expect obsidian , bedrock and enchantment tables all blocks like hoppers, droppers, dispensers, chests and trapped chests, furnaces etc can be pushed by a piston. Also in the bedrock edition we don't have anymore quasi connectivity.

Being able to move all the items you are saying like furnaces and chests and hoppers is not a bug it is how redstone works in bedrock. Redstone is quite different on the bedrock edition of minecraft compared to java edition.

make sure you use 2 water sources otherwise the TNT will be pushed forward onto the pressure plate and explode due to it being out of the water. Maybe by filling both blocks in with water you will reproduce the same behaviour as i have, i will also see if i can get a world save.