I tried to play a few games verse the ai to warm up about 5-7 minutes into the game i was unable to use Left click on units and buildings. I played 3 games had the same issue each time. so i thought maybe its isolated in the verse ai, so i started a campaign session and i had the same issue. I am able to still use hotkeys but that can only go so far when you can't left click on a worker to build a structure, or can't click on a building not hot key'd to build units or upgrades or to hot key the structure. Basically its impossible to enjoy hots with this issue.
The other day in the middle of a game I started to get unbearable lag combined with the inability to use hotkeys. I figured it was a one time thing and might even be due to the lag somehow and ignored it. Then today I try to start playing and I'm unable to select units with my mouse at all. However I am able to set up camera hotkeys and type to my opponent. Anyone have experience with this?
Lol I feel like a bit of an idiot. I contacted support and they couldn't really help me. So I was sitting there thinking about what the hell it could possibly be and then I remembered. Last night after watching some replays I had changed my hotkeys before going to bed and I had misclicked once. I went back and checked and of course that was the problem. You can actually change the hotkey for clicking to select units now. I suggest checking to see if you did this on accident. It's pretty easy to do accidentally all you have to do is double click while changing a hotkey. Kinda weird you can even change this setting but I guess it helps lefties maybe? Well I hope this helps another blithering idiot like me. :)