We (Beaconstac - https://www.beaconstac.com) are seeing an increasing number of Proximity API requests returning '503 - Service Unavailable' errors.
For instance:
<HttpError 503 when requesting https://proximitybeacon.googleapis.com/v1beta1/beacons/3!5dc33487f02e477d4058ac233f25592d/attachments:batchDelete?projectId=beaconstac-1043&alt=json&namespacedType=com.google.nearby%2F%2A returned "The service is currently unavailable.">.
It seems occur at random intervals where all the requests to the API fail at the same time and then start back up normally after a few seconds or so.
We did raise an issue with Google regarding this here and they in-turn redirected us to post the issue on stackoverflow. Is anybody else experiencing the same issue as us?