Inter-VLAN traffic established & related (both on same switch) | Stays the router in between?

Well both devices are already bought about 15 months ago and connected (to be able to configure them remotely), but not configured and in production.


I postponed the case since especially the switch had(/has?) issues and I wanted to give Mikrotik the time to solve it:
CRS354-48P-4S+2Q+ traffic problem on ports 1 to 8 | CRS354-48P-4S+2Q+ traffic problem on ports 1 to 8


At this point I can’t postpone upgrading to newer hardware any longer.
I am not worried about the stability of the router thought; the switch however…


Any suggestions?

Thank you in advance for the input.