Switching high-contrast-mode on or off, does not cause change of used UI colors

Since I have to work on UI issues I have to switch off the needed high-contrast-mode sometimes.

Using the accelerator <Left-Alt><Left-Shift><PrintScr> I switch off the high-contrast mode to work on the UI issues and use the same accelerator to switch this accessibility helper back on.

The UI of TortoiseGit does not update correctly and completely its used colors, when the system changes its colors.

Currently after switching the mode off, not all colors are changed for new windows. Same for already open windows, which do not change all their colors, so that, with high-contrast-#1 theme/design, as example the text in the file list of the commit dialog is still yellow, while the background changed to white.

Worse is the situation in using TortoiseMerge or TortoiseBlame.

Could you please "clean up" and assure to switch all used colors?

Thanks in advance!