Large mobs can ride in boats/minecarts

Thank you Helper for updating the description.
For certain big mob are just fine like :
-Panda
-Horse
-Llama
-Golem

Panda is my fault. They really should get into the boats, but not the horses. You have changed the description to include mobs such as ender dragon, wither, warden, etc. How did you put them on the boat??? Please do not edit the list of mobs, I checked all the mobs with java and boat hitbox, so this is the most accurate list.
Also:
I didn't list Lama.
The golem must not get into the boat.

If you want to add new information about this problem please use the comments.

Polar Bear,Spider is ok.

Elder Guardian and guardian can be put on minecart and boat in bedrock edition.Confirmed

1. Baby mobs can grow and, accordingly, will not fit in the boats. They should not get into boats, like a baby camel.

2. The Guardian can enter the boat as it has a much smaller hitbox than the boat. (This does not apply to the Elder Guardian).

3. Polar Bear, Spider do have a hitbox smaller or the same as a boat, but larger than a minecart hitbox.
   However, in Java, these mobs cannot enter the boat because the boat's hitbox is (about) 1/4 pixel smaller and the polar bear's hitbox is larger than in bedrock. Since these mobs are still too big for the minecart and for parity with Java, I returned them to the list.

Ok

There seem to be issues with panda when riding a boat where the boat button not longer appears due to the big hitbox panda.

Picomos, thanks for your help in creating this report, but the mobs you list below are just variations of other mobs (Horse, spider) and are usually never listed, they are the same mobs with slightly different characteristics. I've updated the list a bit. I also want to say that MCPE-165957 (panda issue) is just a duplicate of this report (I added panda to the list) as the panda's hitbox is larger than the boat, causing this issue.

Zombie Horse
Skeleton Horse
Spider Jockey

If we are going for Vanilla parity then we should only look at Horses, MC-96212 , otherwise leave it as "Working as Intended" since there are ways to break boats and minecarts without player direct action (eg minecart ran into a cactus, activator rails). We use mobs in minecarts/boats as Mob Switches (permanent mobs that block others from spawning), Ghast Block Blast Chambers (especially given that TNT duping does not exist on Bedrock like Java), and general transportation (eg in game Zoos). @Picomos plays @EVGENSYPERPRO

@Mega_Spud can you help clarify this ticket

Hello Draco please see MC-89963

Yes Pico that would be a Java bug report (MC = Java; MCPE = Bedrock). As I said, if the Dev team so chooses to update horses and other equestrian mobs to not ride minecarts or boats, I am all for parity. However the spirit of this bug report is disparity. By that I mean most of the mobs listed are able to ride a minecart in Java, see uploaded photos.

So in all actuality for parity sake Java needs horses and Iron Golems added to the cartable mobs, instead of taking this away from Bedrock. Just my honest thoughts.

As the report say it is a hitboxes issue and it should be parity issue.

My point being Pico, what has been reported here is not a bug. These mobs are intended to be minecartable as I previously indicated. As I also stated these same mobs, save for Iron Golems and only Horses (Donkeys and Mules ride carts), work on Java. There are other bugs, eg random fatal damage while flying, that the devs could be focusing on rather than this frivolous ticket.

If you want to "discuss" this bug, please do so on the Mojira Discord, or elsewhere. This bug tracker is for providing information to the developers about how to reproduce an issue. Please do not add irrelevant / reply comments, etc.

Updated the summary to state the game behavior that is reported.

Please do not use report summaries to state what you think should be. It is confusing because it differs from the format of other reports, and it sounds more like a request to the developers. For feature requests you should use feedback.minecraft.net.

Can also ridding an Sniffer

Note : The issue with Minecart is that when a large mobs get inside the minecart.Then you trying to break the minecart and the results is you can't break it instead you have to kill the mobs first then you can break the Minecart. (MCPE-67223) also describe this issue.
Expected Results is able to interact/break the minecart instead of killing the mobs first then we able to destory minecart.

Feedback : My suggestion to fix this issue is by fixing the interaction between minecart/boat and the mobs.