Mixing polygon heightReference values on different entites doesnt work

I want to have two entities, one with polygon heightRefrence RELATIVE_TO_GROUND and other with NONE.

RELATIVE_TO_GROUND works only if both entities have heightReference set to RELATIVE_TO_GROUND. If one has set it to NONE, both entities are displayed as NONE, but values inside entities seems OK. (0 and 2 for NONE and RELATIVE_TO_GROUND)

In example uncooment line 20 to repeat this behavior.

Example: https://sandcastle.cesium.com/#c=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