Read display errors

Hi. I’ve used an EMClient PRO account without issue for years on a Mac. Two days ago the preview pane and full messages started misbehaving without any seeming cause. The text sometimes overlaps into a mess, or sometimes show as one line stacked into a long column. The pictures don’t display properly at all, sometimes with text/ links overlapping pictures, or sometimes pictures just showing as a narrow thumbnail. I’m on an up-to-date M1 MacBook Air running Sonoma 14.2.1 and there are no other issues at all with the device. EMClient is also up-to-date. The change happened on Wednesday while using EMClient which was working perfectly until the change. I’ve been through all the settings to see if I have inadvertently activated a change through a shortcut but can’t find anything. I’ve currently turned it onto plain text only (which is also too small despite trying to change it in settings) so I can function but it feels like working on an early 2000 Windows device and I really would like to get back to my normal fault free software display. Any ideas? Thank you

In case anyone stumbles on this with the same issue, I’ve found the answer. Right click on message body/ Zoom/ Original. Easy but been an annoying 6 weeks!