Oooff.. That sucks.
I once had problems with the same, could not figure out what the heck it was, I thought it was the microwave, then the toaster, then other things, but it kept tripping. I then had to call a electrician, he did not find the issue.
Then when he left - I noticed my outdoor light was off, meaning the bulb was toast, and I then figured out that it was water in the outdoor light fixture, with a broken LED bulb, which then caused all the issues. hehe