I have noticed that a inventory bug does occur while on realm servers most notable on the Windows version of the game.

here is what happens.

I have tried to find a consistent pattern in which that the issue occurs, but i can't find a pattern that makes it happen. Non the less, randomly at times in this version the items cannot be moved in your inventory. You can drag for example a 64 stack of oak logs from the inventory down to the hot bar. When this occurs it will not allow it to actually move from the spot in the inventory. You also can't shift click it down. It will have graphical animation that brings about 30 down for less than a second. then it will jump back to the place in the inventory. You can exit the inventory and try to enter again and the issue will persist. I found if you pick up a separate block that is not associated with the glitched block type it will then allow it to work normally. The issue also makes it so the glitched block cannot be used in crafting in either the crafting square or the quick recipe book. It will once again show them animate for roughly about a half second and then return to the inventory spot they are locked in.

It may happen in Single player mode. That being said i don't typically play on single player bedrock. I have not at all on this current version that dropped early February.

I did check to see if anyone else has shared about this. But i did not see anyone else. Just thought i would bring it up.  If you have any questions let me know.