Joe,
If it were me, I would point out to the vendor in really strong terms that they are NOT following the standard when they spuriously include an extra CR in the message and thus they have a bug which is unacceptable.
The vendor needs to be told in no uncertain terms that their product is flawed and a imminent fix is expected.
Jim Kosloskey
email: jim.kosloskey@jim-kosloskey.com 30+ years Cloverleaf, 60 years IT – old fart.