Yes, the same situation at
RouterOS 6.34.6 na CCR1036-8G-2S+ FW:3.27
During making changes "ip route rules" all virtual interfaces simply disappear. No bridge, no vpls, no eoip. IP address assigned to this interface stay in the routing table with no assigned interface => but some traffic pass. Icmp echo to bridge interface pass. Newly created ip address is not listed in routing table. Reboot fix this state. Now is upgraded to 6.39.3 and 3.41. I will make some investigations about memory and look at capacitor health.
Did you read manual? .... What? .... Read the manual.