William,
Please report back here.
The difficulty - if it is what I tentatively suggest - comes in identifying which tracks… are they always the last one, two, four, ten?
If not, does that mean that Settings > Library > Background audio analysis beyond wherever a corrupt file (if that is what is causing this) has or has not been completed?
In all cases I found that Roon tech support can and will find them (courtesy of your logs) and that their advice is to be followed.