Since the Redeye update, whenever one shoots with a semi automatic weapon and quickly aims down sight, the aiming down sight animation will also give out a shot resulting in a double tap. Seems like the right click gets understood as a left click at the same time. I can confirm it happening on PDP, grandeur and caulden. Same goes for shooting while ADS and then right clicking for removing it.
The easiest way to reproduce it was with the caulden. The timing is easy to get but quite quick. Just as one would do a double tap but only clicking each mouse button once. Left click then right click.
Tested it on another game and didn’t happen, hence it doesn’t seem to be my hardware nor peripherals.