Clip of bug
https://youtu.be/ODUt0eCUCAU
As u can see at 0:19 sec and after .
You can count the grenades thrown. (it like there was an extra one that went off to my right ?)
Dont know if this has been addressed
Make sure and file a bug report about this on the Halo Support site: https://aka.ms/HaloSupport
Be sure to read over the known issues list first before reporting