That's the one. It was just a slight drop due to the rapid stop. If you look at the motor speed data you can see the high speeds of the two rear motors during fast forwards flight, followed by the decrease when you commanded the stop. It only lost a meter or two of height, but that was enough to hit the ground. The log entries below tell the rest of the story.
View attachment 36755
253.761 : 17904 [L-FMU/FSM]state changed. cur: in air
253.764 : 17905 [L-HOME]Update. lati:52.5854350 longti:-1.9639177 alti:129.48
255.113 : 17984 [L-FMU/LED]action changed. set home
0)
255.841 : 18026 [L-N_MIS]req abort all for reach target height
255.845 : 18026 [L-TAKEOFF]exit auto takeoff plan!
255.850 : 18027 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
255.850 : 18027 [L-FLYMODE]SWITCH2HOVER!
256.905 : 18089 [L-FMU/LED]action changed. Normal Flash(0)
256.905 : 18089 [L-FMU/LED]type:0, normal flash action:
256.905 : 18089 [L-FMU/LED]c0:0,1;c1:0,3;c2:0,1;c3:2,3;c4:0,3;c5:0,3;c6:0,1;c7:0,3
258.030 : 18154 [L-NS][AHRS],qg obv buffer size[218/270]
258.030 : 18154 [L-NS][AHRS],pva obv buffer size[238/270]
258.697 : 18194 [L-FDI][sensor_api_info] head(2,0,31,4).|
263.287 : 18463 [L-FDI]NS(0) COMPASS(0): fault on , noise
263.305 : 18464 [L-FMU/MOTOR]mag_need_action: restart drone
263.322 : 18465 [L-FDI]NS(0) COMPASS(0): fault off, noise
264.521 : 18535 [L-FMU/FSM]not near ground
264.534 : 18536 [L-FMU/MOTOR]safe_near_grd:false
267.478 : 18708 [L-FMU/FSM]near ground
267.657 : 18719 [L-FDI][CTRL]: fault on , impact_in_air
267.674 : 18720 [L-RC]craft ctrl failed!!!
267.674 : 18720 [L-FDI][CTRL]: fault off, impact_in_air
267.776 : 18726 [L-FDI][CTRL]: fault on , tilt_ctrl_fail
267.947 : 18736 [L-FDI][CTRL]: fault on , impact_in_air
267.981 : 18738 [L-FDI][CTRL]: fault off, impact_in_air
268.199 : 18750 [L-FMU/FSM]not near ground
268.430 : 18764 [L-FDI][FDI] ns atti(0) vgz is outlier
268.430 : 18764 [L-FDI][FDI] ns atti(1) vgz is outlier
268.442 : 18765 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.442 : 18765 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.442 : 18765 [L-FDI]fatal error: no ns with level < 4 !!!
268.510 : 18769 [L-FMU/MOTOR]fault on , esc(2) is stall
268.527 : 18770 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.527 : 18770 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.528 : 18770 [L-FDI][FDI] ns atti(0) vgz is outlier
268.528 : 18770 [L-FDI][FDI] ns atti(1) vgz is outlier
268.544 : 18771 [L-FDI]NS(0) FUSION(0): fault on , disagree
268.544 : 18771 [L-FDI]NS(0) FUSION(1): fault on , disagree
268.544 : 18771 [L-FDI]fatal error: no ns with level < 4 !!!
268.561 : 18772 [L-FDI]NS(0) FUSION(0): fault off, disagree
268.561 : 18772 [L-FDI]NS(0) FUSION(1): fault off, disagree
268.766 : 18784 [L-FMU/MOTOR]fault on , esc(1) is stall
268.800 : 18786 [L-FMU/MOTOR]fault on , esc(3) is stall
268.817 : 18787 [L-FMU/MOTOR]fault on , esc(4) is stall
269.397 : 18821 [L-RC]craft ctrl failed!!!
271.121 : 18922 [L-RC]craft ctrl failed!!!
271.360 : 18936 [L-FMU/MOTOR]tilt over (65.0) for (4.0) secs when motor is on
271.377 : 18937 [L-FMU/MOTOR] Stop. reason:roll over or atti fail
271.377 : 18937 [L-FMU/MOTOR]Total start times: 2, time: 300.32
271.377 : 18937 [L-PWM]set actuator mode:IDLE
271.377 : 18937 [L-N_MIS]req abort all for motor stopped
271.377 : 18937 [L-FDI][CTRL]: fault off, tilt_ctrl_fail
271.378 : 18937 [L-FMU/FSM]state changed. cur: motor off
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(1) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(2) is stall
271.394 : 18938 [L-FMU/MOTOR]fault off, esc(3) is stall
271.394 : 18938 [L-GEO][sa_drone_storage_process][0]write flash @ 381663|
271.397 : 18938 [L-N_MIS]Switch new mis 3 req 2 from mis 26 req 16
271.397 : 18938 [L-FLYMODE]SWITCH2HOVER!
271.411 : 18939 [L-FMU/MOTOR]fault off, esc(4) is stall