(strange!) Problem with su_lightbox

Hi,

I’ve used this Plugin for YEARS – its one of the 1st I install on EVERY site I look after……

But I’ve come across some VERY strange behaviour when using su_lightbox !

Here’s the code:

[su_lightbox src="%%video-link%%"]<img class="aligncenter wp-image-15341 size-full" src="https://smarterbusinessprocesses.com/wp-content/uploads/2021/11/youtube_60.png" alt="" width="25" height="25" >[/su_lightbox]

<!-- The code above doesn't (reliably) display YouTube video's - works when I'm (admin) logged in to WP backend - but not otherwise! The code below works fine when it replaces that above...
	
	[fancybox url="%%video-link%%"]<img class="aligncenter wp-image-15341 size-full" src="https://smarterbusinessprocesses.com/wp-content/uploads/2021/11/youtube_60.png" alt="" width="25" height="25" >[/fancybox]

-->

I can’t think what might be causing this – anyone have any ideas to what might be going on ?

The page that demonstrates the problem is on a staging site with (almost) all plugins disabled – and the link to it is visible to all .org logged in users

Regards,

Mike

The page I need help with: [log in to see the link]