I think I would suggest trying changing your HTTP2 to the HTTP 1.1 protocol, based of the research I did, and this Apache information page, which provides some useful insight. (Yes, I’m aware that you are using NGINX, however these information bits are universal regardless of where they are obtained from:) )
I am not sure if using HTTP 1.1 is better than HTTP2 - given that this would apply to all services in our NGINX then. Isn’t HTTP2 supposed to be safer and faster?
I am not an expert in this area though.
In addition, with MM v5.33.2 the HTTP_VERSION change was reverted and my logs are now happy again, so I guess I’ll keep it as is.