I had vibration on the pedal as soon as I pushed it. The "stayed on floor" happened after used the car for 3 times (~200km) with vibration.
There was not any slipping issue since the clutch was replaced back in late 2017.
If I remember correctly the release bearing wasnt replaced (in 2017) and according to the mechanic who is working on my car it was indeed the cause of the problem so I am now waiting for his reply to what other stuffs are need to be replaced.