Hunter

 I was able to collect water by having an empty first slot. Still deletes the bucket though when you place it.

Its bug work for all java edition of Minecraft -vanilla, forge, fabric. But at this time, it can be found after add several command. In next versions it will affect more - more command. More lag

Than more command or command node (argument) add mojang - than more lag spike after every respawn. Than more mod installed, than more this lag will be seeing by player

Nothing, but while i creating mod, i check item nbt and ignore count of item and id of item. Than got error - after drop item check empty slot, see nbt, run some functions. And it will optimize minecraft.

frendlyFire is enabled. Zombie can deal damage to player, but won't.
If spawn zombie and iron golem in same team, he will start fight and stop when friendlyFire disabled.
Enemy ignore player in same team regardless of the team rules.

Ah yes, that doesn't happen in Bedrock so when it happened here on Java I thought it was bugged. Thank you.

This is still an issue in 1.16-1.16.3. I made a duplicate and hadn't realized there was this.

Even when I log out of my Microsoft and Nintendo accounts, the game still crashes, I know that the world isn't corrupted because the world opens perfectly fine about 10% of the time

bug -
if hp>maxHp
then "damage on client side"="real damage"+hp-maxHp
else "damage on client side"="real damage"
fix -
if hp>maxHp then hp=maxHp

How to fix
look at attribute command
attribute @s generic.max_health modifier add 22e67162-454c-4125-9ff5-cb71365a41a8 "mat.damage" -15 add
effect give @s instant_health
will not do fake death.
If my max health is below 20 when i take damage higher than my health it will create "fake death"
For example
5 max hp.
20 hp (hp not reduced to max, because i don't get any heal or damage)
effect give @s intant_healt - take 15 damage to reduce my health to maximum.

How to fix - always reduce health to maximum

Can confirm, I can't walk over a fence/block+halfslab from standing on a chest but when jumping diagonally into a chest and fence corner combo I can jump onto fence. It's as if jumping towards a chest gives me a jumpboost 

i do this, console dont say anything

Same issue here. Don’t really know a work around for this quite yet. Really annoying. I can’t find the way to change software versions of the boot launcher. 
I am running 

Mac OS X Catilina 10.15.4 on 2017 MacBook Pro 13.3" with function key

Model Name: MacBook Pro
Model Identifier: MacBookPro14,1
Processor Name: Dual-Core Intel Core i5
Processor Speed: 2.3 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Hyper-Threading Technology: Enabled
Memory: 8 GB
Boot ROM Version: 205.0.0.0.0
SMC Version (system): 2.43f9
Hardware UUID: 214533AE-FAB3-5549-B3DC-BDC0966BBE65

Yes, it does. Sorry for the duplicate! 

i did that nothing happened

It happened for me with a leashed strider.

I am on Switch and I have had the same problem, it's completely unacceptable that this game does not receive weekly patches, there are more bugs than players at this point.

Uhh, quick update. I forgot that this glitch existed and brought a realm with $30 AUD of Minecoins and it was not sent to my Microsoft account

after previous commands next commad
/data get entity @s SelectedItem.tag.Damage
the result should be 10, but it's not change