I swear I’ve seen this discussed here before, but can’t find it, and my instance is doing this (Still? Again?)
When a link which includes an encoded %20 is pasted directly into the text stream, when clicked an extra %25 is added to the front of each %20, making the link invalid.
It does look fixed. If you roll over my link at the start of the topic you’ll see the extra %25’s added. The link you posted in your question doesn’t have them.
I’ll post the link here again to be sure it’s not just something about me…