Components not saving settings in Delphi 12

I have a strange problem and I am not sure where to look. I have started using Delphi 12. A lot of my TMS components are forgetting their visual settings. For example with TPlanner or TADVStringGrid, I can set some visual settings, such as grid line color , font settings. These setting hold for some time, maybe an hour or a day but they revert back to their original settings. At first I thought I was forgetting to save but that is not the case.

It only happens with Delphi 12. I have never had this problem with another version. It is only happening with TMS components. The native VCL and other 3rd party components are not exhibiting this behaviour.

So , again , any ideas would be welcome

To begin with, is this the latest version of TMS VCL UI Pack?
Do you work with VCL styles / change VCL styles?

Sorry its been a while. I do have the lastest version of the VCL UI Pack. However further work seems to show the problem is specific to TPlanner. I cannot get TPlanner to save the UIStyle property. For example I can set it to tsOffice2019White but within a day it will revert to the default. When I look at the property for the planner, the UIStyle property is gone, so I guess it reverts to the default of Windows 2003 Blue.

Thanks for reporting. We fixed this. Next update will address this.