@vova (I am including @vova and as he/she helped me and may identify the issue with you quicker that way)
I have been having problems with random word searching (causing crashing) and reported it to ROON support.
I type in, for example Rolling Stones or Moby, and it crashes (ie just stops/shuts down after hitting enter etc)
Now… after investigation, the Dev team told me it’s apparently to do with some bad characters in the files being sought - the last word was that it was square brackets [ … ] causing the issue. Anyhow this has not been definitely confirmed, but the +ve news is that I received another message from Brian (“Roon Designer”) who informed me that the problem had been resolved and it would be implemented for the next build update.
I have asked when the next build may be released and not received a reply.
I sincerely hope this helps, as it was a frustrating one for me 