IOS Companion app work out intervals lose sync

Has occurred multiple times but not all the time…

The companion app loses sync with the Zwift on the mac. On recent Ardennes Classic workout ver 58 minutes the companion app lost about 45 seconds as compared to the the Zwift Mac session. this particular workout has a large number of for 30sec intervals. By the the end the companion app was often a full interval behind - very annoying.

The companion app does not seem to appear to get a ‘timing signal’ from the Zwift Mac session.

Is this a known bug? Is there a fix?