502 anad 503 errors using web hooks

I use Geofency and HA web hooks for presence detection. Recently, I’ve been seeing 502 (Bad Gateway) and 503 (Service Unavailable ). Could this be an issue with Nabu Casa, or more likely Geofency? I’m not sure how to troubleshoot this one?
Thanks

I think it’s Nabu Casa. I have two IFTTT web hooks that I made a few days ago which work most of the time but keep getting random 502 errors.