Title Bar Buttons (TBB) will appear then disappear on the On-Screen Keyboard on the Windows 10 Lock Screen.

When on the Windows Lock screen The On-Screen Keyboard will display TBB, the remove, then display, then remove.

In my configuration the below are active Title Bar Buttons:
Toggle Windows Always On Top
Move Window to Different Monitor
Move Window to Current Monitor and Maximize

In some regards this is trival, however, based on what I'm seeing the algorithm controlling displaying the TBB needs some work and said optimization would benefit all other functionality with regards to the TBB. Example: Some times, I've seen the TBB get displayed on the Windows Lock screen from an application sitting behind and the TBB just seems to float there associated with nothing (the app is behind the Lock Screen). There are other TBB events like this and they are occurring on an extremely fast system with no load.

Keith, Love, totally love this product. I'm using the most current 9 Beta 3

I just tested it myself, again, and it currently isn't doing it. However, it is a frequent phenomenon.

I've seen it for at least version 8, and it was appearing on another system which I've deprecated. Now, I'm seeing it from time to time on a Dell Precision 7720 with UHD-1 video resolution (3840x2160), Intel HD Graphics 630, and a Quadro P5000 with the most current video drivers. Clean install of Windows 10 Pro, 64-bit, OS 1703, Build 15063-413.

I'll keep and eye out for what might be the trigger. When it starts to happen it seems to occur for some time.

If you need any other specific technical specifications, just let me know.

I greatly appreciate the fine work you and the developers have made on this product. There are few that I'd love to have my name associated with.