I've found a bug that causes chunks of an element to be deleted when pasting something nearby.
To reproduce it:
1. Draw a shape from the left to the right side of the screen
2. Copy the entire shape
3. Paste, and rotate twice with ctrl+r before placing just at the bottom the other shape
4. There should be a chunk missing just above where you pasted
It's a slightly convoluted thing to do I realise, but I figure it's worth pointing out at least.
I'm using TPT version 95.0.345, on Windows 10 Home. I have the LUA script manager, but this happens even with all scripts disabled