HTML Content display error (Yahoo mail)

I have used Emclient for at least a year and noticed (possibly only with the most recent upgrade) that several HTML formatted emails (usually commercial) barely or don’t display.  I might get a line or two (or nothing) of a multiple page image.  It displays properly in Yahoo webmail and Mozilla mail client.
Is there anything I can do to ameliorate this and/or help diagnose it?

eM Client does not display linked content with some urls. 

Please see my comments at https://forum.emclient.com/emclient/topics/some-images-missing-from-emails-received-from-senders-on-…

Maybe, but that doesn’t help me.  I guess I’ll go back to Thunderbird since no one associated with the product seems to read/care.