Azure Recovery Service agent corrupted after Fast Ring updates

Last 5 fast ring updates I have the issue that the MARS (Microsoft Azure Recovery Service Agent) gets corrupted after doing the upgrade to a next W10 fast ring build. Every time I repair the installation and after the next fast ring update, the MARS service (Obengine) is gone. Starting the MARS MMC then results in an 'invalid error' and I cannot proceed to the dashboard.

To repair, I need to remove the MARS software via ControlPanel\Add-Remove Programs and then re-install. After that I re-register the W10 workstation to the Azure Recovery Vault.

Having this issue on both a W10 desktop and SurfacePro tablet.

Currently on build 18361.1 and no improvement.

I know, Fast Ring is not for production testing. But getting insight in these issues is also part of FastRing testing ?

Anyone ?