Yesterday, Roon released 1.5 which does first unfold of MQA. It allows DSP to occur on the MQA stream.
Apparently, there is a known issue with the current fw of Bridge II that causes many dropouts to occur when using DSP with MQA. Turning off DSP in Roon resolves the issue, or setting the DS config in Roon to decoder-only works around the issue.
Roon says they are aware of the issue and will be in touch with PS Audio/Conversdigital.
I wanted to make PS Audio aware of the issue here as well,