Is nvv* elements thread-safe?

For example I have c++ program that creates two gstreamer pipelines in separate threads. Both pipelines have nvv4l2decoder elements (created separately for each pipeline). So, are the nvv4l2decoder-s thread-safety? If I received error from nvv4l2decoder in one pipeline, what will happen with second pipeline? Assume that nvv* elements are thread-safe, but I didn’t find any information about it in documentation

The implementation is thread-safe, but there might be minor issues not well handled. If you meet issues in your development, please share us the steps or test sample for replication.