I noticed that after the upgrade to version 12.0.1 the taskbar entry for MobaXterm (https://mobaxterm.mobatek.net/) is stuck on the main screen (windows taskbar) and won't move to the secondary screen no matter what.
This worked just fine in the previous 11.x version, so something must have changed in v12.
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I tested with the latest version available at the time of writing: 25.4 (Installer Edition).
There are a few other apps that have this issue as well and we've got it on our list to fix up for the next version, which should be available some time in January.