Ceramic Capacitors v's Tantalem Capacitors

[ppppenguin]

Sorry, forgot that it was voltage sensitivity, not temperature. That's very strange for a low value ceramic. This article says that for C0G (the modern designation for NPO) the capacitance shouldn't change with voltage: https://ec.kemet.com/understand-ceramics...emperature

If your caps are N750 then I suppose it's possible that they also have some voltage sensitivity.