Iris+ rapidly losing altitude

Please help!
I continue to have problems maintaining altitude while flying the Iris+.
The problem seems to be getting more frequent lately.
I am experiencing this in a variety of flight modes and well as during a mission.
I have tried recalibrating the esc and no improvement.
I have the onboard video and some ground base video as well if needed.
When Iris+ starts to descend I input full throttle and you can see it still landed pretty hard.
Flight from ground view

Check your log from this flight and see if it went into failsafe from low battery. You can’t really tell much from the video.