Can confirm. Just experienced this while in a mine trying to jump against a block.
I haven't played my minecraft in 3 months 😞
Its clear this bug is definitely not a small or isolated issue. I realize this is not a "support" forum. None the less it is where users can provide information regarding issues and they will inevitably also seek information. Is it too much to as for someone from Mojang to get on this thread and provide some feedback. I'm not talking about a "how to fix", just an acknowledgement of what this issue is and what they know so far and what is being done. I find the silence from them on this thread deafening.
Bug is more easily reproduced when travelling at full speed and exiting the boat at shore without slowing down. Happens about 1 out of every 4-5 tries. Boat will disappear, player will clip into it causing super-slow jumpy movement until player is outside the bounds of the invisible boat. Boat reappears when chunk is refreshed by travelling to nether and back or restarting, etc.