We upgraded our SmarterMail production system form 8451 to 8482 BETA/RC last Friday.
Right after this we noticed that some system/DynamicNavs emails are have "wrong" subject lines, being displayed/string with =?utf-8?B?

What is wrong here? Because with SmarterMail build 8451 is was OK I wonder what changed with Build 8482.
Email-protocols being affected: EWS eMClient v9.2.1713),  MAPI (Outlook 2019), EAS (iPhone OS 16.4)
SmarterMail Webmail is ok/displays correctly

I already opened a support-ticket for this so that I hope this can be fixed/corrected before the official release of the NEW SmarterMail.