REVerence bug: Meter falls out of sync?

Hi, over time, the REVerence meter seems to fall out of sync? not sure if this is something going on with my system, or? you can see on the right, the meters play back correctly (according to my buffer delay), but on the left, REVerence meter is clearly out of sync.

If I restart Cubase, it corrects, but over time again goes out of sync.