I own a Logitech K800, so not sure if that's related because my friend doesn't have the issue, but this doesn't happen in ArmA 2. When I type, the player still moves around, so when I hit 'o' it shows the watch, and when I hit 'E' it leans my character and it does this for everything. It seems that typing in the chatbox doesn't have the player controls disabled.
- Legacy ID
Type in chatbox
Reproduced, Microsoft Sidewinder X4 here. Makes chatting in MP pretty impossible because especially E and Q are very lethal when your character leans or rolls out of the cover. Also other stuff (compass, clock etc.) is activated.
Win 7 64-bit and Alpha v0.50.102517 here, I'm using development build though so no idea why the version number is same than before.
EDIT: Duplicate with http://feedback.arma3.com/view.php?id=2837