Yes, this is a massive headache for us. Effectively plain text emails generated by mailto that have (encoded) line breaks are now presented by IOS 14.6+ as one contiguous block of text littered with (lt)BR(gt) and also phrases within beginning with https:// are no longer presented as clickable. Apple - you are significantly impacting other companies value to their end users where business models are around generating and sending light-weight emails to their users. You need to address this ASAP.