I am assuming the bullet strike past the first shot was into wet vegetation?? Don’t think l have ever noticed that before.
I believe the reason first shot impact was so visible is because it was a miss and struck @ full velocity. Look closely at the much smaller impact dust cloud after the 2nd shot which was a hit.
The reason you had never noticed it before is most likely because Owen seldom misses.

Unfortunately, I am able to hunt daylight only for past 5-6 years and have noticed that when I miss, the dust cloud is usually obvious beyond the target. Hits, not so much due to the energy shed in the target.
Love the videos, DU, especially in slo-mo. Really helpful in learning lead for those, especially me, who have less experience on running coyotes. I used to never shoot at a running coyote unless he had first been hit, thus very little practice. Have gained a bit more confidence as of late, largely due to watching yours, and others thermal videos. Thanks for posting.
Regards,
hm