XY positioning no longer works

My P1P no longer ejects into the pooshot container but right onto the edge.

I ran out of filament on one print. After I reloaded, the print continued as expected.

Later when I had the part in my hand I saw that the nozzle was displaced. (Layer Shifting)

the printer (the stepper) recently makes nasty noises when homeing on XY.

the belts were retightened several times.

is the problem known?

klick on the link for a small list of posts

thanks for the info.