@Joseph-TP Thanks, originally it didn't display both extenders at the same time for at least weeks and yet now the second one appears within the hour. The problem changed from a permanent problem to...

@Joseph-TP It happens either way around, just the RE220 displaying or just the RE305 displaying on the C6 router onemesh lists or app. As I've now confirmed they are both working even when not...

@Joseph-TP RE220 V2.0 1.0.2 Build 20201022 Rel. 66896 RE305 v3.0 1.1.5 Build 20210416 Rel. 61543 The fault is different than I thought, both of the router's Onemesh menus (Basic -> Network Map ->...

Archer C6 router (V3.20) with RE220 and RE305 Onemesh extenders. All firmware checked/updated a few months ago when the system was working fine, recently noticed only one extender was operational...