Quad Flips Shortly After Takeoff

I have a few drones and this is the first issue I’ve had like this. On 2 separate occasions (today and yesterday), I have been flying my heavy lift quad at about 20 feet. The flight characteristics look great, minimal drift and Z-axis variations, until out of no where the quad flips upside down crashing into the ground.

I am running PX4 firmawre on a pixhawk 2.1 with a here+ gps.

Has anyone else had these issues?

link to the logs:



These are two different crafts. These crashes happened 12 hours apart, and this problem is the first of its kind. Have there been any firmware updates that could cause this?

I should also mention I am using a lidar lite v3 as well, set to fuse (not primary).