Suspension knocking after heater fix??

[cb31]

Got a Taycan with standard air suspension, there was something loose in the boot lid which rattled around when it got to the top of opening and then again when it started closing. Took main dealer 4 days to sort, not sure why but apparently they couldn't work out what was happening. Strange as it sounded just like an internal bolt had fallen off but anyway. While it was in there they did a factory recall for passenger heater replacement, a new part even though the existing one seemed to work fine.

Since getting it back every time I go over a speed bump there is a knocking from the front passenger side. Took it back to Porsche the day after and they suspect a ball joint which even though under warranty I suspect will be chargeable.

Does this sound right to mechanical people? Car has done 36k, it definitely wasn't doing it before it went into the workshop and was doing it straight afterwards. I know this 100% as my house has multiple speed bumps outside which I have to drive over to get to the main road.

If it is a ball joint I understand coincidence but it suddenly failing during the 4 days they had it? Car drives perfectly, just knocks on speed bumps. I suspected something loose which jiggles on a bump rather than a ball joint but I'm not a mechanic. Are they potentially having my pants down?