Odd trouble with recently switched screen which is in1st plan but it is not active :
Since installed the last update [ on aug 13 2021 ] I have had an odd trouble as I "alt + tab" or click on the icons of the Taskbar to switch to another window. Usually I work with 2 instances of Microsoft Word opened , one of Excel , Photoshop , Chrome , etc , switching screens to copy images from Chrome or copy text from Word to paste them on Photoshop. As of the last update , it requires me to give aditional clicks to turn active a screen that has been switched to the 1st plan [ the screen is in1st plan but it is not active ]. On Photoshop it requires me 4 or 5 clicks to have it operational ; the Photoshop icon on the taskbar remains flickering if I donīt click a couple of times onto Photoshop screen to turn it active.I noticed when I drag ( just drag , no click ) the mouse cursor onto the taskbar , the screen is in 1st plan becomes deselected at once.
Anyone else having the same trouble ? Please some suggestions.
Thank you.

Windows 10 Pro 21H1
Windows Feature Experience Pack 120.2212.3530.0