SUMMARY

Build http://commits.kde.org/digikam/5c08af48ee59836d3bc89aa30197fe92d43f2caf

I selected a picture in thumb view and pressed full screen view icon. I moved along a few pictures using cursor keys and then pressed ESC. Instead of exiting full screen it skipped back to the first picture, sometimes even one before the first (if available). Then I had to press ESC a second time to exit full screen

STEPS TO REPRODUCE
1. Select a picture, press full screen, display picture
2. Use cursor keys to move along a few pictures
3. Press ESC. First selected picture is reshown
4. Press ESC again to exit full screen

OBSERVED RESULT
Full screen is not exiting cleanly. The exit appears to skip back either to the first, or some random number backwards, as sometimes it skipped back to the one just after the first. Regardless of how many it skips back, it always does it.

Note, Slideshow does not exhibit this behaviour.

EXPECTED RESULT
Full screen should exit at any point 

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.14.2

ADDITIONAL INFORMATION