Thunder can't display the image in this comment, but it loads fine in the web UI.
Before there were retroreflective coatings on road signs, some places used retroreflective dots to trace the letters and shapes.
The image link in question:
Screenshot of web UI of this post:
It works fine if you replace all the non-ASCII characters. Still a bug, but knowing this may help find a way to fix it.
Thanks for the report, this is definitely a weird one. I've created a PR with a fix for this issue here: https://github.com/thunder-app/thunder/pull/1572!
For some additional context: Thunder automatically performs encoding on URLs. However, in this specific scenario, the URL was partially encoded (the brackets were encoded, but the non-ASCII characters were left behind). This partial encoding caused Thunder to incorrectly encode the already encoded brackets (%28 and %29)