I recently bought three EX521 and set up two units as EasyMesh agents. 

I have been noticing my IoT devices disconnecting and not being able to reconnect to any of EX521 APs.

I tried to configure the settings of 2.4GHz network to use b/g/n modes only. 

However this setting is applied only to the EasyMesh Controller. 

EasyMesh agents don't receive advanced settings, and still offer 2.4GHz in AX mode. 

This leads me to belive that other advanced settings are not propagated as well, such "long GI", or RTS Thresholds.

Unfortunately, in the current house I am in, I am unable to set a wired backhaul and try to configure each device as an AP (without mesh).

Since EasyMesh only sync network name and passwords, I would like too see any of these options available:

1. Allow EasyMesh to sync advanced network settings;
2. Allow to configure advanced settings in EasyMesh agents;
3. Allow to configure the EX521 as a repeater, instead of EasyMesh Agent; (see RE605x as an example, which you can choose to create a 2.4GHz or 5GHz link between APs)

I believe any of these options would address the issue, while 2 and 3 would give more freedom for the use.