@BlackholeGP
Have a look at the video, see if it answers any of your questions.
If you can not reproduce any of the actions, maybe they can be dealt with separately.
Don't always assume that it is a problem with Gimp, keep an open mind and look at other areas, hardware problems, Windows updates, other software interference.
As a summary the video (6 and a half mins) shows
Drag-n-drop to open an image
Drag-n-drop to add an image (open as layers)
Drag-n-drop to move layers from one image to another
Dragging dialogue tabs around
mouse over main menu entries.
Forgot about moving a layer up and down the layer stack but that is just a click and drag here.
Have a look at the video, see if it answers any of your questions.
If you can not reproduce any of the actions, maybe they can be dealt with separately.
Don't always assume that it is a problem with Gimp, keep an open mind and look at other areas, hardware problems, Windows updates, other software interference.
As a summary the video (6 and a half mins) shows
Drag-n-drop to open an image
Drag-n-drop to add an image (open as layers)
Drag-n-drop to move layers from one image to another
Dragging dialogue tabs around
mouse over main menu entries.
Forgot about moving a layer up and down the layer stack but that is just a click and drag here.