I've been busy with school since it's finals week. I will once I'm able.

I'm back. And I tried playing the game without the Dev build on. The problem is now fixed after an update.

UPDATE:

Even while in developer mode, I now get the constant crashing when taking damage. Multiplayer is now unplayable for me.

It's still not completely resolved. There are still some instances where the game can crash when taking damage. But it doesn't happen so much as compared to when developer build is off

I switched back over to regular mode (with developer build off) and the same thing happens - I get shot or take damage and the game crashes. So only while in developer mode it doesn't crash when I take damage

I found a way to play the game without this happening - But it's not the best solution as it limits the amount of servers you can play on. But this fixed it for me sorta..

1. Open Steam and go to your game library
2. Right click on ArmA 3 Alpha, click Properties
3. Click on the BETAS tab
4. Click on the drop down menu, choose development - Development Build

Only problem now is that I can't remove development build now. What this does is change the type of servers you play on to DEV servers. If someone finds a fix on how to switch back, let me know.

UPDATE ON THE DEVELOPER BUILD:

My mistake, I was unable to switch back because the game was already running lol. So you can switch back. My mistake :P