@JnhoKaddia I've encountered that thing with the popup a number of times. It isn't consistent though, and I haven't been able to figure out what causes it.
For the other issues you're having, I wonder if you might try a "factory reset". There are instructions for this here...
https://answers.ea.com/t5/Technical-Issues-PC/READ-FIRST-Troubleshooting-your-Game/m-p/3621199
Basically, this will make it so you have a fresh TS4 folder with all the original settings to then test and check if you're still having problems. Just be sure to make a backup of your game so you don't lose your saves and such.