We have Tor and we also use scheduled IO threads. So if the app/OS is doing other things in the IO thread, the upload might be delayed a bit. But it shouldnt be that long. So I think it is mostly a slow connection + wrong date time of the phone.  

 I just bumped it to a 5 minutes window. Let’s see if this will improve the situation a bit 

 +/- 5 mins or just to the past? 

Void.cat seems to be annoyed by auths a few seconds in the future from us. 

 abs(sig_ts - now()) < 5 mins