Edit on multiple Interface does not allow to set VLANs

[basti1508]

NetBox version

v3.1.7

Python version

3.9

Steps to Reproduce

• Open Interface view of device
• select 2-n interfaces
• click on edit
• select e.g. Untagged VLAN
• click save

Expected Behavior

the vlan will be added to the interface

Observed Behavior

nothing happens.
It is also not possible to select the 802.1q switching type in that view (which may cause this error)

[jeremystretch]

VLANs can be assigned only to interfaces with their mode set to one of the 802.1Q options (untagged, tagged, or tagged-all). When an interface with its mode set to None is saved, any VLANs associated with it are automatically removed. I can confirm that specifying the mode when assigning the untagged VLAN functions as expected.

Granted, the bulk edit form should at least throw a validation error to avoid confusion. I can take that.