chtMultiRegionSimpleFoam - of2112 does not catch analitical results where of2106 does

Summary

The same test case if it is run with of2106 the analytical solution is obtained, if it is run with of2112 the analytical solution is not catched.

Steps to reproduce

The case is shared in this repo. The test case is taken from this article. Just run "Allrun-serial" to launch the simulation. Try to run the simulation loading of2106 environment and then using of2112 environment. The solution given by of2016 is correct the one computed using of2112 is wrong by some degrees in temperature.

Example case

The test case is taken from this article.

h is the convective coefficient on the far right of the system, it is so low as it must represent vacuum. Lc and kc are set to 1e-6 m and 1e-4 W/m/K.

The case is very simple and fast.

What is the current bug behaviour?

Analitical solution not catched by of2112 but catched by of2106. The one computed by of2112 is 330 K and 335 K whilst the correct one is 327 K 338 K.

What is the expected correct behavior?

To catch the analytical solution.

Relevant logs and/or images

Please see section above.

Environment information

OpenFOAM version : v2112 | v2106
Operating system : ubuntu
Hardware info :
Compiler : precompiled versions of v2112 and v2106