In beta the find functionality seems to not work correctly. Closing Find form via Close button vs Esc key behaves differently as it then either does not search anymore via F3 or searches 2 previous seach term. So the following:
Ctrl+F -> a -> Enter -> Close -> Ctrl+F -> b -> Enter -> Esc - now F3 searches 'a' instead of expected 'b'.
Previously the Find form Esc key does not revert to previous search nor clear the search term, as expected.