Steps to reproduce
After pressing enter the blockquote loses all its “levels” (>>>).
Pressing shift+enter still works to maintain the same level.
Before the update if smart indent lists was turned on it used to keep “level” 1 (>) and drop out of the block quote with the second enter with no text in the line.
Above level one it used to drop one level for each enter and drop out completly at some point (can’t remember).
Now it drops out completly regardless of level on the first enter, which seems to be unintended looking at the before and after and i couldn’t find it in the patch notes.