GFCI breaker tripped after a year

Background, installed hubbell 9450 inside a NEMA 3R junction box outside with a GFCI breaker 14 months ago. I use a Tesla mobile connector at 32 amps on 6 gauge metal clad wire. Today the actual GFCI breaker tripped in the panel, twice. I have a backup mobile connector and am using that for the moment to see if that was the issue. But I’m flummoxed this is so random.