Canon is following the hardware release plan for this firmware. Delay. Delay more. Delay even more. Release.
After the hardware release comes the tape fix, and perhaps a glue job on the mirror.
Then comes the firmware plan. Advise that issues will be fixed in a future unspecifed firmware update, delay, delay, release partial firmware fix, release a fix for the update, release a fix for the fix for the update, and then, it starts all over with replacement hardware.