Hello. Thanks for taking your time to test my issue.
My game path is "C:\Program Files (x86)\Steam\steamapps\common\World of Tanks\na\". I'm not sure what you mean by special characters. For spaces, I left the default path for steam on Windows 7.
For the vehicle tiers, I meant the romanized vehicle tiers letters on the vehicle panel (IV, V, VII, etc). On my end, it's enabled in-game:
and disabled through the following mod:
----------[ PANELS & WINDOWS (IN-BATTLE) ]----------------------------------
Panels by Aslain
Remove vehicle tier
I also tried verifying the game files integrity through steam and it found nothing. I'm running the game on an old hdd dating from 2005, it might be the cause for the bugs (most of my games load after the initial 30 seconds timer). I guess I'll hope it gets fixed in the next update. In the mean time, I'll try and disable my mods one by one and see if one of them causes the issue.
Thanks again and have a good day!
Xavier