Sorry, I don’t know if adding a post here is better than opening a whole new thread about this, but I’m observing a weird phenomenon ever since I updated my X10III with Sauna 4.6.0.13 (I didn’t go through EA, I waited for the general release).
While the overall situation with mobile connection has definitely improved (I formerly had to keep it on “prefer 3G” to prevent “Limited connection” issues, as widely discussed on the forum, now this seems to be fixed), I’m now seeing this weird thing happen: every once in a while, some Android apps (but not all) lose connectivity. How is this even possible?
The two apps that I have observed retaining internet connection when the others go offline, at least so far, are Whatsapp and the Tor Browser, whereas Telegram and Firefox are affected, for example. All installed from Aurora, nothing special going on in my setup (I made no tweaks or tinkering).
EDIT: I do have microg installed, though, if that counts as tinkering 
Using the “network subsystem reset” function from Sailfish Utilities seems to restore internet connectivity for all Android apps, but this is so weird that I thought it was worth to report it, maybe it could lead to a better understanding of the underlying connectivity issues we have been observing for a while (even if it seems that different users are affected in different ways).
I can open a dedicated thread, if needed.