HotSpot Auth probleme

Hello there
here is my new problem since this summer ( 2018 ) latest upgrade OS 6.4x.x

Hotspot with share user was working verry well last summer OS was at 6.37.5 ( 4 connections with one code) user wase able to connect and disconnect leave and came back to the hotspot zone later and still have connection

Since this summer after i upgrade my router to 6.4x.x my user are no longer able to leave the wifi zone they have to reconnect everytime and mac address duplicat in active user with different ip and also after some in and out connection the user goes out of login share. also everytime the time only double to limit count.
Router model is CCR1009-8g-1s-1s+

and the hotspot server config didn’t change since last year
here is my config for serveur and user profiles
server-1.JPG
userprofile.JPG
Capture.JPG
Anyone have solution for these?
Any help will be appreciated
Thanks in advance