The Band of Mana and Greater Band of Mana do not get updated in the baubles inventory in multi-player.

The blue mana bar overlay on the xp bar stays at the same value until the player takes the band out of the baubles inventory. If the band becomes empty very strange issues start to occur as the client still thinks it has mana.

Tested with the Flügel Tiara.

Works fine in single player.

Botania r1.3-135
Baubles-1.7.10-1.0.1.8
forge-1.7.10-10.13.2.1230

I really can't do much about this without bogging the player with tons of update packets, not ideal.