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)