So I just setup a second monitor on my dev machine. I have the main mon set to 1080p while the 2nd mon is set to 3840x2160 and scaled to 150 percent. If I have the app GDI awareness set to anything other than system aware (per monitor, per monitor v2 and GDI scaling) when you slide the app with MFM control onto the 2nd monitor and back to the first, the tabs loose the custom style you have applied. I tested with Windows 10 Slate Gray and Gnome dark from DelphiStyles.com.
Hello,
This has been fixed and will be implemented in the following update of the TMS VCL UI Pack.
Kind regards,
Gjalt
Many thanks