The augment Double Time allows reloading while sprinting. If you begin reloading while stationary or even running (not sprinting) and start sprinting before the reload is done it interrupts the reload. Is this intentional?
Double Time
HonourBound
(HonourBound)
#3
I’ve used doubletime but haven’t experienced this bug, you might want to check in the game options if “Sprint cancels reload” is off, that’s all I can think of 
CCP1151
(CCP115)
#4
It’s definitely affected by the “Sprint cancels reload” option in the game options menu.
Either turn the option off, or sprint then reload after you start sprinting.