Okay friends, after a long and very frustrating day I give up hoping that the wisdom of the collective can provide and answer. We have a cross-platform application written in Xojo 2019 R1.1 that has a canvas-based Toolbar across the top of the window, and a couple of container controls that fill the rest of the window. All of them are Locked top/left/right/bottom.
If I resize manually, maximize, minimize I don’t have any issues. Things act like they should. However, if I hold the Windows key down and the do a quick Right Arrow and then Left Arrow the canvas and the containers go all weird. I think this called the Windows ‘snap’ effect but I may not have the name right.
Anyway, why should the control locks suddenly stop working? I could maybe see the container controls but the canvas? It’s quite possibly the simplest thing on the whole window.