Every now and then my drawing view moves to the far end of the screen. (hundreds of metres from the sheet)

When i use the "zoom all" command, i see 2 black dots in my screen: the drawing view on the left, the sheet on the right.

Moving the drawing view, requires to zoom in, but dragging the view to the sheet would take hours this way.

Only option i know now is to delete the drawing view, and start again, but this happens quite often.

(the model is locked on 3 planes, it doesn't  move)

Please help