I’m facing a somehow similar problem with an Arduino Yun.
I have the Yun using my celular as access point in order to connect to Thinger.
When for some reason I disconnect the cell obviously the connection to Thinger drops because the Yun is not connected to the internet anymore.
The problem is that the connection to Thinger is not reestablished even when the cell is reconnected and the Yun is up again (unless I perform a hard reset on the YUN)
Shouldn’t Thinger reconnect as well without the need of a hard reset?