Hello, thank you for awesome tool.
Did not find similar issue here, so reporting.
v7.7.1

1. Open find/replace dialog, put smth in "find", move to "replace", put smth there
2. Switch to some other window with Alt-Tab (that's important)
3. Switch back to N++ with Alt-Tab (that's important)

Expected Behavior

Focus should stay in "Replace" field, I can continue typing

Actual Behavior

Focus moves back to "Find" field, and field text is selected (typing will replace entered text)

Debug Information

Win10 1809 17763.557
N++ with administrator privileges.