Good news!
The issues was already know in SPI, LHCb and Dmitri pointed me to adding this line:
export LIBGL_DRIVERS_PATH=/cvmfs/sft.cern.ch/lcg/contrib/mesa/18.0.5/x86_64-centos7/lib64/dri
And this fix the issue!
I am digging deeper with him to try to understand if this can be fixed at ROOT level, and what caused the problem.