Train the model with my own label data but can't predict?

[Markfoy]

Hello, I have met the question.
Everything is ok, when i use the demo dataset, i can predict the canopy height of my research GEDI waveforms.
When the ensemble model is trained with my own dataset, the train result is ok, although the train precision is weak (RMSE=7. ~9.). But I can't predict the test GEDI waveforms even though the test waveforms are the subset of the train dataset. I try to adjust the model parameter (net/batch size/optimizer/...), no help.

TRAIN RESULT

the TEST RESULT

Would someone help me?THANKS!!!

[shkaelioff]

Please do you solve this problem, if it is solved, can you share it, thank you very much