100%: With no weapon equipped, if Sprint is held while moving and the camera is aimed down, releasing Sprint will force the camera to pan back up.
60%: With a pistol equipped, with the camera aimed down, pressing Sprint will force the camera to pan back up.
It doesn't seem to happen with a rifle equipped. It seems sporadic with a pistol equipped. But with no weapon equipped, it happens 100% of the time, in any Arma 3 mode, mod or setting. Unbinding "Sprint" from any key fixes it. Rebinding "Sprint" causes it to reappear.
This is very annoying when attempting to pick up loot from the ground quickly. Either I didn't notice it before the most recent patch, or I never produced a sequence of inputs which caused the issue to manifest before then.