I’m not sure what “the backup file” is as I do not know what you’ve done to migrate to the new image. If you have exported and imported the mysql tables then yes i would expect the same.
When you look at the inputs page is there any processing in the inputs or are they blank?
Since you have feeds on the feeds page but they are not updating, I suspect you have migrated the tables.
That doesn’t sound good.
That sounds correct, the user can remain logged in (using remember me) but the admin level session times out as a security feature (see Admin session expiry and logout).
There is another discussion going on about high memory usage by the mqtt_input service (see Mqtt_input service high memory usage) that may (or may not) be related, perhaps we might know more by the time you return.