Offhand item still shown/not updated when moving in boat

When moving in the new boats, your main hand disappears (intended, pretty sure), but your offhand is still shown.

https://gyazo.com/98f2474c13473e8f824ad9202f7eaa26 (Filesize is too large to attach and I'm too lazy to compress it)

Using the F hotkey to switch items between your hands does not update the offhand's displayed item while rowing.