I mostly play from Apple products - MAC Book and iPhone - and almost always on WIFI.
It seems to happen frequently, and more often as of late, where upon attempting to conduct a crime, it simply shows the hour-glass equivalent of "loading." This loading will go on indefinitely, and I often have to navigate back and forth in excess of twenty times before it succeeds.
Case in point, I have got to Crimes > Kidnapping > Mayor in over a dozen times, and it has only successfully worked once.
It is the same for using items as well. Medical items. Drugs. It's all the same.
It is extremely frustrating, to say the least, when it takes 5-10 minutes to conduct these simple tasks that shouldn't take more than 60-90 seconds.