Saeco Incanto filled with ground coffee

Hello,
I own a Saeco Incanto 8911 and I have a recurring problem I’m unable to solve.
In less than a week the machine gets filled with ground coffee at the rear of the bay where we put the brew unit.
(Orange circle)
There’s around 2-3cm of dry ground coffee there, so much that I need to vacuum it to clean it.
There’s also a lot of wet ground coffee under the brew unit and in the mechanism, at some point it seems that it disturbs the good operation of the brew unit as the coffee becomes lighter and as soon as I clean the brew unit it works again.

In the past I replaced the rubber rings of the brew unit, it seems to me problems started after this but I checked if everything was installed and greased as it should and if everything was moving freely and I didn’t find anything obvious.

I also have the feeling that the beans are getting empty faster than before but I’m not sure.
I can't tell if the problem is too much coffee being ground or if it starts by the ground coffee falling in the mechanism and blocking it then the bad movement allowing the coffee to fall behind.
I already cleaned everything, opened the machine to disassemble and clean the grinder and the channel where the coffee is sent out of the grinder, run the calibration feature in the hidden menu after the grinder was cleaned but without success.

Does somebody know what could be the problem?

Has the brewing unit already been completely disassembled, cleaned and greased?

Spontaneously, a broken funnel on the grinder would come to mind.
The powder enters the brewing unit through it.

hello,
yes it was disassembled in the past when I replaced all the seals, and greased it.
This is when it seems to me that the problem started.

I re-disassembled it and there is nothing that seems wrong, I only find that it sometimes feels like the mechanism doesn't lock totally when it goes back to it's "standby" position.

Hello,

In the past I filmed once the brew group working without noticing anything wrong, but today I checked again and filmed the brew group a couple of times while it’s working and after a few coffees the problem became visible.

After the coffee is ground there’s always a small amount of dry coffee falling at the bottom of the machine, I thought this was the origin of the problem, but it’s not.
It seems the main problem is the pad of used coffee which instead of falling in a compact quite dry piece, is too wet and sticks in the chute where it gets ejected then coffee after coffee this wet coffee sticks everywhere in the mechanism and accumulates where the arms of the mechanism rests, limits its movement and next coffee the brew group isn’t aligned with the grinder.
On the video I attached we see that a part of the coffee is ejected and another is sticking to the mechanism, the coffee I made after this one, everything stayed stuck on it.

How can I solve this problem of coffee being too wet ?
Most of the sites I see explains it can be a coffee too coarse or too fine but I never changed it between the time it was working fine and the time problems happened.
(The only change was the replacement of the rings inside the brew group)
And also is it normal to have this dry coffee falling on the right side of the brew group ? (It always happened since the beginning)
Video of the problem

Saeco problem

Thank you