Fall Detection has gotten ridiculously sensititve.

I've been wearing an Apple Watch for series 4 since it first came out. I'm used to false alarms from pounding my hand on the back of a knife, or other such things. But in the past month, it has gotten ridiculously sensitive. It detected a fall when I closed the medicine cabinet, when I waved my arm, and other benign actions. Yesterday on a bike ride it detected a fall several times just from bumps on the path.

Has anybody else experienced this? I'm wondering if a software update is causing it, or if somehow the physical fall detection components have failed.