so i have an rt-ac86u running merlin 384.13 version and acting as aimesh router. also i have a rt-ac68u running on stock 300438445717, acting as an aimesh node. my problem is that although i set the aimesh config to ethernet, it is stuck on 5g connectivity. how can i troubleshoot this? is someone else having the same issue? for info i've tried to run the rt-ac68u on merlin 384.13. same issue.