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eCAN in selftest mode doesn't update MSGID register with received ID

remibonnet
Prodigy 90 points

Dear all,

I configured the eCAN module in self-test mode (STM=1)

One mail box is configured in receive mode with MSGID = 0xDFFF F000 (ie extended ID 0x1FFF F000, use LAM) and with LAM 0x0000 0FF0
That means this mail box will receive any frame having extended IDs 0x1FFF F000, 0x1FFF F010, 0x1FFF F020, up to 0x1FFF FFF0

When I send message with ID 0x9FFF F050, the receiving mailbox generates an interrupt. MDL, MDH and MSGCTRL registers are updated with the content of frame.
BUT MSGID register still contains 0x9FFF F000 (instead of frame ID 0x9FFF F050).

Is it a normal behaviour ? Only due to self test mode ? How can I get the real frame ID ?

Thanks in advance,

Rémi