Exim SMTP BDAT support

Back in 2017 an Exim vulnerability meant that BDAT support was disabled in Exim by setting chunking_advertise_hosts = "" After 3 years, has this now been fixed so that BDAT support can be re-enabled? We have a client who can't receive messages from and important client of theirs because of this: Error: 550 5.6.11 SMTPSEND.BareLinefeedsAreIllegal; message contains bare linefeeds, which cannot be sent via DATA and receiving system does not support BDAT