My suggestion is to open a ticket on Github. You’re welcome to reference any of my Play_Raw’s in the ticket. If I’m made aware of the ticket - I’ll keep monitoring and if they need Camera settings or other information I’ll be happy to provide.
UPDATE: Seems to be a very common complaint going back to 2020 and the R5, R6, R6mk2.
There is also a forum discussion about out of date exiftool for ART here: False color Canon CR3 file (ART 1.8.2)