I’ve tried to use MVRP on a network with a few switches, and found that once a VLAN is created somewhere, it propagates by MVRP to all switches and remains everywhere even after it was removed. Rebooting doesn’t solve this (except maybe if all switches were rebooted at the same time?), the only way I found to get rid of old VLANs is to disable MVRP everywhere (after adding necessary VLANs manually). Is this normal, or is MT implementation of MVRP nor quite ready yet? Going back to no MVRP for now.
Sounds like a bug to me - the VLANs should be removed. sup-out to support@mikrotik.com