SUMMARY
When copying files from window A to paste into window B, the clipboard isn't updated for subsequent pastes. For example, if you copy file Foo from window A, you can paste it into window B. However, if you then try to copy Bar from window A and paste into window B, file Foo (the first one copied) will be pasted instead.


STEPS TO REPRODUCE
1. Open two windows in Dolphin.
2. Copy a file from the first window and paste into the second window.
3. Select a different file from the first window and paste into the second window.

OBSERVED RESULT
The file copied from step 2 is copied during step 3.

EXPECTED RESULT
The file copied from step 3 is copied during step 3.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 5.26.4
KDE Frameworks Version:  5.101.0
Qt Version: 5.15.7

ADDITIONAL INFORMATION
When copying and pasting within the same Dolphin window, the clipboard is updated as expected. However, when pasting any file that comes from a different window, it will only ever take the first file you pasted until you close and re-open the window.