[otrs] Customer mail address wrong since update to 3.3.10

Hi all, since updating to 3.3.10 last Friday, I have a problem with OTRS running on OpenSuse. When making a reply to a customer's message, the mail address of the customer is encapsulated by HTML " tags like this: [cid:image001.png@01D00241.B7500970] I am able to delete the mail address from the list and add it again, then I don't have any "quotes" in the mail address: [cid:image002.png@01D00241.B7500970] Does anyone else have this issue? Any idea where I can fix this and how? Thank you! Regards Daniel Litzbach