What kind of rig, which TPMS and what kind of stems (metal, rubber)?
Had the same issue with our new tires/sensors - way more than 10 PSI loss and it was
not due to temperature change.
Our issue may be because of metal stems on our Class A.
The vendor suggested valve stem extensions, but I haven't had time to try that yet.
Not sure that's such a good idea anyway, as some people a few years back reported
leaking or having had them fail and ruining their tire.
G-half can always find a way to do things upside-down, inside-out or backward.
It's his Super Power!