Dual appsink in a pipeline, C API -> pipeline is stuck

Hello here, 

In a pipeline, after decoding the input pictures from a RTP stream, I put a "tee" element. 

The first of the "branch" of this tee re-encodes the picture and then sends the encoded packet to the application thru an appskink element.

The second "branch" of the tee is connected to another encoder and then connected also to the application with another appsink element.

My problem is that as soon I declare the second appsink element (without even connecting it), the pipeline is stuck. Without creaing the second appsink, the first branch is working.

Any ideas ? Is is possible to insert multiple appsink in 1 single pipeline ? Any properties that I can try?

Thanks for ideas and help,
Sylvain.

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