Hi, your log is not so clear and im not a proper expert, but the roll and pitch controls did not responded to the setpoint starting from around 40 sec, then in the accelerometer graph the first acceleration in x and y seems to indicate the beginning of the fall, around 40.4s and the real crash with the ground at around 41s am i right?
Look here at my log:
https://logs.px4.io/plot_app?log=731d240d-e17e-44f3-af9a-df2f43f89fd7
seem quite the same thing, but i have also a power module capable of reading Amps on the battery and Voltages too, and im my case you can see a big Amps drop.
Maybe could be also your case, system not responding correctly due to Power issue, but you cannot see it without a current and voltage sensor.
If you’re interested in my case, consider checking also my topic:
Hope it could help you 