When looking for a release on MB, the green 'tagger' button does not work, i. e. it doesn't have any effect, no error message, he just doesn't do anything. Therefore I cannot search for my releases manually. The problem appeared in the last 3 months. The 'Lookup in browser' option doesn't work properly either: he does not recognize a cluster as a release, looks for it as a track and is then missing a track number. However, this second problem can be worked around by manually correcting it each time.