I am getting a slightly different issue in addition to the general lag and slow down.
At times, there will be a graphical glitch where in the home base screen, the 3 flags (World Energy, Raid, and Titan) will have the indicator at / (e.g. __ are blanks), if there are any energies still charging, the cooldown timer will still be displayed underneath the flags, sometimes texts are scrambled, and if there is a war currently going on, the current war scores are unable to be displayed. This happened occasionally, in the past, maybe once every few months, and usually clears out after getting out and going back into the game, but this issue seemed to have amplified drastically after the update, where I would start and quit out of the game 3 or 4 times with the same results and I had to restart my device, just so I can get the graphics to display correctly. Not really affecting the game play if I was just doing normal farming or questing, but kind of annoying.
Recently, the MV also seemed to be glitchy too, and may have a compounding effect. If the ads I am getting are those where there are interactions involved (example: a Progressive insurance ads that had Flo on skateboard), the ad rarely runs very smoothly and sometimes just hangs with the timer not counting down, and if you try to click on the X to quit, the game either won’t respond until 10 seconds later tell you that if you quit you won’t get the reward. And usually at that point, you really do just want to quit, and if you tap the quit, it’s another 10 seconds or so to respond, and the game tries to go back to the home screen very sluggishly, and tries to show you another ad after another 30 seconds (if even that short amount of time).