I don't believe there is any known incompatibly between the Rovelight and 622 setup, as long as the Rovelight's remote controller is not hooked up to anything. PotN members have demonstrated that if you stack the Rovelight remote on top of a 622c (Canon only), you will likely lose HSS unless you tape over the firing pin on the Rovelight remote.
If you wade back through the nearly 100 pages of this thread, you'll see that there are many PotN members using 622 + Rovelight 600's and speedlite combinations with no problems. These are popular components here and this setup is common. Most people seem to be keeping the Rovelight's remote in their pocket, for changing power levels only (myself included).
There are other variables too that could be preventing things from working properly, like the camera body being set for E-TTL flash mode, or the Rovelight having its optical eye turned on and triggering off a speedlite preflash or the beginning of a speedlite's HSS strobing.
The best way to start diagnosing this issue is to simplify the whole setup to just Camera body + 622s + Rovelight--no other speedlites, remotes or anything connected or communicating. Get that working first, then start adding other pieces to the lighting setup.