Hi
A complete explanation of configuration nat64 gateway & dns64 with Mikrotik
https://youtu.be/2Uao9BBB-8E?si=7Q-qDSMi3-rx9ATD
I will try itinterference in wireless between ap-3 ->ap4 and ap-5->6,7,8
for example,
set 5180 on ap-3->ap-4
and 5700 on ap-5->6,7,8
also, move away ap-4 from ap-5, make sure they are not nearby each other.