Can you tell me what scanner upgrades you have that should be working but aren't?
Also, what phone are you playing it on?
Sorry to keep asking questions, I'm having trouble tracking this down.
Have you adjusted the zoom level in the game settings? (Or, do you have anything on your phone that increases the text size in apps?) If you go to settings and reduce the zoom, do the icons appear?
If you turn the phone sideways, does the game go into landscape mode? If so, do the icons appear then?
It's alright, I find this really weird too. I tried adjusting the zoom all the way down to 40% and up to 200% both normally and sideways, no effect. The screenshots I sent should be the landscape mode, I sent the scanners I have just in case I misunderstood something but I checked screenshots of the game available on the internet and it looked same as mine just without the missing scanners. I don't think there's anything changing text size in my phone.