I have a similar NUC setup, I had problems for a while several years back and ultimately determined the OS file system disk was corrupt. I wiped the existing drive partition, created new and formatted with EXT4. Much to my (pleasant) surprise all of the issues I had been having were resolved. Roon has been rock solid since the reformat and reload. (about 18 months). Might be worth a try. I did the drive wipe and format on a different machine using a third party software product (maybe Paragon) on windows.
You are not alone. Many will tell you they have no issues with ROON. Personally, I donât believe this to be the case. There are issues with the software, which should run on simple hardware, but hardly a week goes by that I donât experience some kind of issue.