Problems with multivalue tags

Tags: #<Tag:0x00007f756ac14288>

Hello I have updated the tags of my music library with MusicBrainz Picard. However any tag with multivalues only save the last value. I.E. in Picard The Genre will display as: Rock; Punk. however in foobar it just says Punk.
I have tested this with vlc, music bee, and foobar with the same results. I am using the lastfm plugin to retrieve genres. My collection is encoded as .mp4 if that matters