Some comments are missing and/or not delivered

Hello,
Some comments to IG posts are not delivered to our webhook API. We couldn't find a pattern of how the comments are not delivered but it still leads to a missing data issue.
An evident example of this issue: https://www.instagram.com/p/C3C-P_moj41/
Could you please help to overcome this issue? Our API is up and running without any downtime.
Thanks!