Hi,
I had a similar issue (except it was every 3 days or so) recently with the previous but one build. After my logs were analysed by support it turned out to be half a dozen or so bad M3U playlists that Roon could not import and kept on retrying. Once I deleted them the restarts stopped. I also updated the Operating System to release 148 at the same time as it had got stuck on the original release version.
The odd thing was that those playlists had always been there (since ROCK was released back in May) and not caused any trouble until that update. You may have a different issue though.