I don't think that's a wanted behavior, but when I open my barrel next to my beds, they appear in this mod's tabs (sometimes duplicated, as noted in #30)

Fixed in 0.8.0

This will be fixed in the next update.

A single bed tab was originally planned to appear only when it is a valid time to sleep, but I later decided not to implement that feature as I felt InventoryTabs should be for inventories only.

I then forgot to exclude the bed block tab when I pushed to release haha