Last year I asked about a problem where the Toolbar order on a DockPanel reversed when changing VCL styles. At the time it could not be confirmed but it continued to be a problem in my app. This year I re-visited the problem at the insistence of users and I think I have tracked it down in a more re-producible manner: a simple horizontal resize of a form also generates the toolbar re-order - but only when the app is is 64bit. When compiled as 32bit nothing happens.
Sample code is attached, screen recording of the app showing behaviour available from this link:
Project1.zip (72.1 KB)