Good news!
I think, I have found the problem's source. I use Google Play, and my phone updated that as well.
https://play.google.com/store/apps/details?id=com.google.android.play.games
I was investigating SWgoH's lagging and freezing up for me as well, and when I turned off this app's one setting called "Automatic logging into supported games..." (Sorry, I have a Hungarian version, so it's something like that.) the freezes completely stopped!!! The lagging are less frequent as well, tho, still remaining, but not like after 5 minutes of play, but like 30 mins-1 hourly, which is much more tolerable.
If you use the same app, just turn that setting off, and hopefully your gaming experience will once again turn better! I sure hope, this was the cause of the problem, and that I managed to nail the source of the problem...for CG too! Seems like this software tries to log into games (as the setting/feature says it tries to help with), but multiple play store accounts causing problems with it, with trying to force both (or more) account into the game. Strangely, other games have no problems, so it's still a problem on both this app, as well as from CG's part too!!!
Please try this method and tell us, if things got better! I sure hope so!!! May the (Dark Side of the) Force be with You all! >:3