I have a thread up here several months ago that deals with a faulty GFCI breaker in our main breaker boxes above the driver seat. It was for the GFCI for the washing machine. My breaker simply failed for no obvious reason. Yours may be in the process of failing also.
What made a simple replacement difficult is the amount of effort i had to go through to find an appropriate replacement breaker. The Eaton breaker appears not to be available through any of the standard outlets, even industrial outlets. The 20 Amp EATON GFCI breaker now appears to have replaced by a Siemens breaker. The issue is that some safety organization, now requires a breaker to not simply be a ground fault breaker but also one that detects possible arcs/sparks and the original Eaton does not do that. The Siemens does comply.
Here is a link to that thread.
... Oh, the expensive Eaton multi-function breaker available at the big box stores would not have worked as it is designed to go into a new style breaker box that, at least in my2019, is not used.... there is a new style box with a new neutral bar in it.
I went out and bought spare breakers for every fundamental type of breaker used in my coach and with 2 spares of the new Siemens GFCI breaker as it was available through Amazon but not at Lowes or Home Depot. I now carry a complete set of unique replacement breakers for every type breaker used in my Cornerstone in my spares box in the basement. I'd advise you to get the Siemens now as your breaker may well go out again, and the next time, not recover.