I recently downloaded version 2.1.3. There's some nice improvements such as texture generation by resolution and block models. Admittedly I haven't updated for 8-10 months.
That said, I see the undo function has changed. Previously, if you were cleaning up meshes or point clouds and you accidentally deleted something, you could undo, and it would leave your deleted data cumulatively selected (red) as you undo, then you could deselect what you wanted to keep (what you accidentally deleted), and then delete the rest of the data again. This was great. But now, each time you click undo it wipes the selection of the previous undo command. So then you have to redo all your cleaning if you go back to recover something you too aggressively cleaned.
Let me know if I am just missing something, or if others also noticed the change and would prefer it to go back to how it was.