Yep, so - essentially - we are still (back) in the “you’d better use a different network, or you could …, but …”.
BTW mtest001 has already posted another tested approach using (or mis-using) proxy-arp here:
this proving that VRF’s are not strictly necessary to solve this problem, in his words making the Mikrotik a “kind of L2 router”, but that I prefer to consider a “cleverly configured” switch.