I want to make you aware of the fact that the developers of OnlyOffice seem to be removing existing features from the open source version after some time. (OnlyOffice removed Web/mobile editing from version 5.5.0 of Community Document Server)
Interestingly, I didn’t find any note or announcement about this from the devs. It just happened all of a sudden.
With this happening behind the scenes you’ll never know what they are going to cut next. I’ll consider if I want to rely on devs with such practices.