Since the new update, I'm not able to keep a charged weapon (press and hold attack button) for more than a few seconds. Used to be I could hold onto it for as long as I needed. Now, it will release at inopportune times, sometimes getting me into trouble.
I checked for lag -- the 'signal strength' bars in the corner of the window is at full.
Might be somthing with your comp.. couse I dont have this problem..