I’m dealing with same issues. Summer time car will hold itself up almost indefinitely. Around 0C it will hold for a couple of days. -10C Will start noticing compressor running more often. Below -20C I won’t take car for long days where car parked outside in the cold for long. Car always stored in heated garage. I’m pretty sure it’s the drivers side front airbag as that’s the first to drop when in jack mode if left in cold. Have plenty of other vehicles to drive so haven’t dealt with the issue yet as it hasn’t been too much of a nusance.

Been keeping an eye out for a salvage car that matches mine closely to strip for parts and hope to get the necessary parts then!