Genre tag... disappeared

[simoncn]

Thanks for this. MinimServer includes the file location in the track URI. If the control point is caching genre information by track URI, moving the track somewhere else would change the track URI and could cause the control point to be unable to find genre information for the track in its cache, even after a rescan.

You could verify this by copying the track back to its previous location and doing a rescan. If this causes the genre information to reappear, it confirms the above explanation.

Other UPnP servers don't put the file location in the track URI. This would explain why moving the file location doesn't cause this problem with other UPnP servers.

Does the control point have some way to force a reload of its cache? If this fixes the problem, it is further confirmation of why this is happening.