Update (12:45 EST): This has been resolved and Push Services are now operating as expected.
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We are experiencing issues with Push Services in the European region.
Until this is resolved, users in this region may have difficulty receiving incoming calls on their Mobile Apps when the app is in the background or the device is locked.
Teams are actively working on this now.
Our Status Page can be viewed here: https://status.softphone.com/components/5cdaf4144e80f1334b55d6d6