Hotspot users disconnect problem 6.30.4

Hi guys

Having a problem with a hotspot system. The hotspot system is running on a bridge of 2 ports which then have transparent wifi access points. Users connect to the wifi and then get the mikrotik login page. The problem is sometimes the users connect and it causes an issue where it then connects, straight away disconnects and then disconnects all other active hotspot users. Sometimes it happens with 5-6 users and other times when there 15-16 it doesn’t seem to matter. But once it happens it means everyone has to disconnect, reconnect and then login!

I have no idea what is causing this, anyone have any ideas?

Here is what the log file says when it happens:
15:59:06 hotspot,account,info,debug PFUSER023 (192.168.40.59): logged in
15:59:06 hotspot,info,debug PFUSER025 (192.168.40.58): logged out: admin reset
15:59:06 hotspot,info,debug PFUSER023 (192.168.40.59): logged out: admin reset
15:59:06 hotspot,info,debug mike (192.168.40.69): logged out: admin reset
15:59:06 hotspot,info,debug PFUSER028 (192.168.40.70): logged out: admin reset
15:59:06 hotspot,info,debug PFUSER016 (192.168.40.115): logged out: admin reset
15:59:06 hotspot,info,debug PFUSER004 (192.168.40.126): logged out: admin reset
15:59:06 hotspot,info,debug PFUSER023 (192.168.40.32): trying to log in by cookie
15:59:06 hotspot,account,info,debug PFUSER023 (192.168.40.59): logged in

Thanks,
Jamie

How to fix it ? i have some problem.