From the MIDI-CI p29 spec it looks like the test message in the new negotiated protocol is still a MIDI 1.0 F0-F7 formatted Sysex message ?
Should it not be in UMP when MIDI 2.0 UMP is selected ? Assume "p23 0x02 MIDI 2.0 Protocol" mean UMP ?
The MIDI 1.0 Protocol bracketing method with 0xF0 Start and 0xF7 End Status bytes is not used in the UMP Format.
MIDI 2.0 Protocol: Version 2.0 of the MIDI Protocol, as defined in this specification. The native format for MIDI 2.0 messages is UMP