This issue is also affecting slime blocks, when bouncing using the blocks it will cause the player to snap to another block, in some instances this will prevent the player from bouncing on slime blocks at all. If several are side by side it is as if the player was snapped into a different place and pushed up and down
We got the screenshot from my friends Xbox but it did happen on my PC as well
The nether portal will place you while still stuck in the building terrain loading screen as well, so you do not even have a chance to try and dig or break your way out
Please Note this bug is still affecting all tools using the Unbreaking Enchantment as of 1.16.100. If Unbreaking is removed from the tool in question instant mine and mining in general is possible without block lag on all levels. Please correct this, this issue makes doing a core part of the game incredibly frustrating.