Start at EPPR at time as depicted on picture. Use Showcase mode to move camera over cloud tops right after sim start - 3d thermal visualization clearly shows thermal shooting well over cloud tops:
Provide extra information to complete the original description of the issue:
I’ve seen exactly the issue as described by the OP . I’m a RL glider pilot with numerous “cloud climbs” (Brit glider pilots are allowed to do that, and it’s often helpful given our mixed weather). In the SU12 Beta it’s straightforwardly possible to keep climbing above the clouds.
If no or partial, please give details below on your findings: