Why is authorization required when reconnecting to wi-fi?

Question

WiFi

Good day, comrades!
We have access to the wireless network through a bunch of mikrotik / captive portal / radius. At first, we encountered the problem that Apple devices in standby mode immediately turn off the wi-fi module, and the system immediately requested re-authorization when the device was turned on. Looks like they've fixed it, but haven't really tested it yet.
Now the problem is the following. If the client reconnects to another network, and then returns to our network, then authorization is requested again from him. As far as we understand, Mikrotik sends something to the radius, and the session is considered closed, and, accordingly, the client needs to log in again.
Has anyone encountered similar problems? How did you fight?

Answer 1

This is not a MIkroTik problem, these are your settings. configure the profile properly.

Answer 2

Greetings.
Check the settings of the Hotspot server so that there is an entry in Cookies. It's like in the picture. So that the next time a client connects, your router authorizes it by MAC. Well, just in case, increase the lifetime of the assigned ip in the DCHP server.