Enemy Tanks disappear

I have downloaded this Game and all went smoothly. Then after one a few updates ago I found that the enemy, “Red Tanks” would completely
disappear. Even if they were close. it never happened in the first version I downloaded. You need to correct this Wargaming!
I will NOT spend any money on this game if I am not sure if this will continue. I’ll buy the Atypical game first. They always work on my IMAC.
I have a quad core with 12GB Ram. Never had a problem before with any game on the App store until this one. It is a good game but needs a litttle TLC.
I deleted it about 5 times but downloaded it again. About to delete again forever if this continues. Nothing worse than an invisible tank getting
you from behind.

Fourpctneanderthal about World of Tanks Blitz PVP, v2.9.0