[AFMUG] Ubiquiti and VLAN Tags

[Matt]

Couple years back setup several Ubiquiti NSM5's to bridge several
buildings to together.  One set as AP bridge and couple others as
slaves.  After upgrading firmware and setting defaults put in very
simple settings of WPA2, passwords, etc.  Recently they added some new
gear to there network.  Is there any reason they would strip off VLAN
tags?