Hello,
If this setup worked in v6 firmware, I recommend using that until this feature is fully supported in v7.
However, I don't see any plans from our RnD team to implement a high availability mode at the moment, so it might take a while. Your suggestion is noted and will be forwarded to the RnD team.
Priority options, in this case, would be a 'band-aid' solution to the issue.
Best regards,
DaumantasG