Hello, We confirm this serious bug.
After upgrading from 10.1.38-0+deb9u1 to 10.1.41-0+deb9u1, replication is completely broken. For the moment we `apt-mark old` mariadb package with 10.1.38-0+deb9u1 version on all our servers. Regards, -- Grégory Colpart - CEO Evolix - Clé OpenPGP : 0x44975278B8612B5D Evolix - Hébergement et Infogérance Open Source Marseille (37 rue Guibal, Pôle Média, 13003) / Aix / Paris / Montréal http://evolix.com | Twitter: @Evolix @EvolixNOC | http://blog.evolix.com
