This is a small quality-of-life/UX improvement, which despite years of use I still often misclick in WinBox. Some interfaces in ROS can have virtual interfaces attached to them (e.g. vAP for wireless and VLANs for other ones). When adding such interface a natural flow (at least for me and couple of folks I blind showed the UI to) is:
- Select interface I’m interested in
- Click [+]
- Select VLAN
On pictures the flow looks like that currently:


The issue is the new window which is brought to create the VLAN never populates the interface with the clicked one - (a) - but instead uses seemingly random one (last one used?):

I searched on the forum but I didn’t see any mentions on this yet. I wonder if this would be hard to add as a feature in Winbox?