Issue while trying to send message with len of 7

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Hello,

From the documentation :
Note that len property contains the actual length, not its encoding in CANFD frames. So valid values are:
0, 1, ..., 8, 12, 16, 20, 24, 32, 48, 64.

I understood I could send message with length of 1,2,3,4,5,6,7,8,12,20,24,32,48,64.

I probably misunderstood because I have issue while sending a message with len of 7. It seems message is not sent.

I have no issue while sending FD CAN message with len of 1, 4 or 12 for example. (awesome library !)

Could you please confirm 7 is an authorized value ?

Thank you by advance !