I don't accept it is coincidental that both our 3 and Y have this issue every summer and the Y was delivered with it.
Had one used RAV4 that had it. Had a Honda fit for 11 years that never had it nor did our Civic, Sienna, MR2, Celica, or X3 all at the same location/garage. The one vehicle, RAV4 actually had a recall/TSB ... I will try and dig it up.
I am sure Tesla is not the only one with this problem but if I bought another 3/Y it would be 3/3 given our usage/environment.
A new design would be able to significantly reduce the occurance.