I have 2 CRS305-1G-4S+IN units.
One I was able to change to switch OS and set the unit to use DHCP but fall back to 192.168.88.2 if DHCP is not available.
The second, I can factory reset and use RouterOS. But if I change it to SwitchOS, it is no longer accessible.
Is there something else that I need to do?