I have the same issue - Two year old Series 2 Rachio trips the GFCI breaker every few days to every few months. This has been happening reliably enough now that we go check the breaker after the sprinklers run. I ran a refrigerator and deck lighting without issue from this GFCI outlet for a couple of years before dedicating it to the Rachio - and occasionally run power tools from it without issue. No issue unless the Rachio is involved.
