Hi you
1. No
2. Yes, only happen when roaming between Ap7161 and Ap7562
3. Client still connect Ap7161 with bad signal until Ap7562 nearly and good signal
4. Yes same broadcast domain
5. Yes, only 1 VLAN and same layer switch
6. Yes same FW Wing 5.8
7. I don't use firewall
8. Yes i setup mesh but all Ap is root.
9. I enable Smart RF
10. Radio chanel i set auto and default
11. I use external antena 15dbi sector and omi
12. Yes i used 3x3 antena 3 antena 5ghz for mesh and 3 antena 2.4 for client.