Reproduce: 1. Open Dolphin 2. Navigate via cursor keys to a file 3. Press F2 to rename (the actual goal was to copy the filename) 4. While the filename is still in edit mode: Press Alt+Tab to switch to another window (to paste the filename) 5. Press Alt*Tab again 6. Trý to navigate to the next file via cursors keys. => Nothing happens (actual) / EXPECTED: Keyboard navigation works WORKAROUND: use the mouse to click somewhere in the window to make keyboard work again.
Can confirm.
Confirming on 6.4.5. Actually, the thing is that keyboard focus changes from where the files are either to the next tab if you have multiple tabs open and to Places sidebar if only one tab is used (did not check where focus goes when Places is not displayed).