1.6.1 - viewer - fullscreen - blinking black under certain conditions

[user0]

XnViewMP 1.6.1 64bit
Windows11 (22H2), display resolution 3840x2160, win scaling 150%

Viewer - fullscreen
blinking black under certain conditions

To reproduce:
1. open any video/image in Fullscreen mode
2. try any of the following actions:
- press F12
- press Del button
- click LMB, move mouse a little bit, click RMB, repeat few times
image will blink (turn black for a moment)

if there is no blinking with image file - open video file, reproduce issue, scroll to image file, issue will appear

ps. same issue in 1.4.5, 1.5.5, no issue in 1.0.0

[xnview]

with only image file, are you able to reproduce?

[user0]

no,
looks like it only happens if video files has been opened in fullscreen previously

[xnview]

i'm not able to reproduce