problems with images in tips

Hi gerkin.
I’m having problems with using images in tips.
basically, the media-tip wasn’t working for me.
So, I used html to insert images in a regular tooltip.
previewing the page was fine, but once it turned live the images don’t appear.
if i go back and edit the post, highlight the tooltip, and click the G icon, i can see everything fine. The image appears ok. It’s only on the published page that it’s not coming through.

here is the page:
http://itaintmagic.riken.jp/learn-some-science/evolutionary-morphology-godzilla/2481/

and the two tooltips with images are on the words “homology” and “prothallium”

Any thoughts as to why this is happening would be great.

https://ww.wp.xz.cn/plugins/ithoughts-tooltip-glossary/