Issue with TFLITE model in TVM

I tried to import a model with LSTM layers and when I execute in TVM, I get following errors

only support one subgraph (main subgraph)

Any ideas on how to execute these model

I saw same issue. any clue? I converted tensorflow keras lstm model to tflite and import it. keras lstm model generate multiple subgraph for LSTM layers. why this limitation (one subgraph supported) was put?