@gunrunnerjohn, I have fallen victim to the automated Crowdstack URL parser/shortener routine used. I've seen it affect links, images, and videos. If you were to click the "<>" button on your affected post, you would see that the URLs for the resources are incomplete. It can sometimes be a pain to get them corrected and stick...
Test image...
The above test image is linked as follows and mangled by the Crowdstack parser: https://ogrforum.com/fileSendAction/fcType/0/fcOid/149802438915415905/filePointer/149802438915415930/fodoid/149802438915415920/imageType/MEDIUM/inlineImage/true/433mhz%2520Receiver%25204-Channel%2520[Relay%2529.png
The correct link is this: https://ogrforum.com/fileSendAction/fcType/0/fcOid/149802438915415905/filePointer/149802438915415930/fodoid/149802438915415920/imageType/MEDIUM/inlineImage/true/433mhz%2520Receiver%25204-Channel%2520%28Relay%2529.png