Disappearing City Wall?

Question:

My city wall has seemed to have disappeared. I know for a fact it was there throughout the day because I upgraded a few of the traps and turrets. I checked my mail box, and have no war reports of being attacked (only war reports of me taking oasis).

Has anyone else experienced this before or have any help on why this happened? Or am I just going crazy? lol

All your help is very appreciated.

You probably missed a war report, no way your wall disappeared, it would have reappeared next time you logged in if it was a bug!

False section btw....
Maybe u are in the false city? Deleted war report? Build 1 trap and see what will happen

i got something like this i wanted to upgrade a level 8 turret to level 9 howver when i click upgrade it did not upgrade to level 9 infact, not only1 turret downgraded, my other level 8 turret dowgraded to level 1 oh well.. i am sure this is the same citt

If you're in one of your subs and then you leave the app and let it run in the background for a while, when you come back it will put you back at your main. This seems to overlay your mains' defenses with the defenses from the sub you were just in, ie if you have a few traps in your sub and all turrets in your main, it will look like those traps got superimposed over your mains' turrets.
Only way to fix this is to close the app from backgrounding and re-open it.

This happened to me as well, and my upgrades have been going to lv 1 for no reason as well