Coffee grounds fall into large drip tray

Hi guys.

First of all, thank you very much for the recording.

For a few weeks now, the coffee grounds have been permanently falling into the large drip tray(DeLonghi Perfecta, ESAM 5400, about 6 years old) and hardly ever into the container actually intended for it. Also in the machine, coffee residues are usually lying around everywhere on the floor.
Before and after brewing the coffee, there are the normal "clicking or cracking noises" due to the movements of the mechanical parts. Since the coffee grounds fall into the drip tray, however, these noises are partly different, also partly arranged differently (these cracking noises are partly no longer in the order they used to be).

I have also recently disassembled the entire brew group, cleaned, inserted new sealing rings, cleaned the strainer, and lubricated the piston. But that was not the problem.

The problem is still present. Can anyone help me or give me advice?

Many thanks for your help.

Greeting, Wilko