questionable implementation of H operator in fvMatrix.C, redundant introduce of the internalCoeffs

Summary

To make the problem simple, only take convection term to illustrate. Please see the detailed description of the reported bug below. Please point out if I have misinterpreted the code. I have checked the code thoroughly but cannot find a reasonable consideration for it.

Steps to reproduce

Example case

What is the current bug behaviour?

What is the expected correct behavior?

Relevant logs and/or images

Environment information

• OpenFOAM version : v2112 (many other versions as well)
• Operating system : linux
• Hardware info :
• Compiler :

Possible fixes