I'm testing ecmp on ipv6, routeros v7.10.2.

config is:
ether4 - ptp interface template, directly plugged into router2
ether5 - ptp interface template, directly plugged into router2
both interfaces show up in neighbors, either will work if I disable the other. ie, 'it's working'
both routes show DAo+, ie it claims ECMP. I just can't get it to do it.

assigned 2004::1 to router 1, 2004::2 to router 2, both on a loopback. both interfaces show up in ipv6 routes. Data only flows on one interface. If I flood out some pings from router 1 to 2, srcaddress 2004::1 to 2004::2, it goes out ether4 and comes back ether5. Run a bandwidth test 'both' directions and it alternates interfaces but doesn't use both. set connections to 20, same.
yet I cannot get traffic to pass both interfaces in ECMP.
sourcing from the loopback interface to make sure I'm not locking onto a specific interface.

added vxlan from 2004::1 to 2004::2 and a 10.1.0.0/24 ipv4 and .1 and .2 to each router respectively. speed test between ipv4 addresses over the tunnel, still no ECMP.

If I run multiple ping windows from each router to the other, multiple bandwidth tests, I can get a tiny amount of data on the second interface but I just can't get it to ECMP.

Thoughts?