drag and drop

I have a Surface Pro 9 with Thunderbolt™ 4 Dock, and have a Dell 24" monitor and a Sceptre 27" 4K monitor. I run Visio Pro 2021 extensively and have a problem that just started a few weeks ago. If I have Visio running on the Surface Pro 9 display, all functions work as expected. I I drag Visio...