It looks like some sort of ABS related issue. On LFSW you can see that ABS is not used, but in the replay you can clearly see that:
1) The ABS indicator is not permanently lit, meaning ABS is ON.
2) The tyres flash orange under braking in F9.
I don't have Z actual installed so I can't check with that, but if there's nothing out of place when watching with that, I guess the lap is valid and it's a client bug.