Unreliable Wifi Mesh GL-B2200

I’ve setup a wifi mesh at home using 3 GL-B2200’s but my devices (phones and laptops) lose connection to the network very often (sometimes every few mins but I haven’t worked out any pattern to this). When it’s working, it works really well with a strong connection but obviously having it lose connection so often makes it useless. I’ve reset the GL-B2200’s multiple times to setup again from scratch but the problem persists. All 3 of the B2200’s are on the latest firmware v3.215.

What can I do to try and resolve this problem?

I am using 3 B2200 as well.

Only a few times they have problems but resolved by itself.

Can you reposition the nodes?