train dialogflow to recognize phone number

I would like to extract phone numbers using dialogflow for my chatbot. I was going to use the @sys.phone-nunmber, but there is a weird bug in the French version. Even if the system correctly recognizes the number (for instance "06 25 48 79 31") as I can see in the training system when I call the $value associated, I only got the 8 first digits (here it would be "06 25 48 79"). It is quite weird because it is not like the system would have only recognized the first digits. It is only the value that is weird.

Then I tried to create my own @phone-number but the system only recognizes phone numbers I ever showed him. It does not generalize even if I select "Allow automated expansion".

Does someone know how to solve that?

Solution

There is no use to train the system anymore because @sys.phone-number has been fixed.

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