Character encoding breaks link when federated to Lemmy

This link breaks when federated to Lemmy: https://pad.tchncs.de/form/#%2F1%2Fview%2FbHySC3F243ze02BAsF69Tg%2FDCWDXrExoUA+RtdSaR97wSz0PosipmJaHtAoZdtb2LQ=%2Fauditor%3DUUdTT3VLWjVzQytMbGk3cUs1SG1vem5IODl3RkNNY2o%3D%2F

= are replaced with %3D and some / are replaced %2F

Broken link after federation: https://pad.tchncs.de/form/#%2F1%2Fview%2FbHySC3F243ze02BAsF69Tg%2FDCWDXrExoUA+RtdSaR97wSz0PosipmJaHtAoZdtb2LQ=%2Fauditor%3DUUdTT3VLWjVzQytMbGk3cUs1SG1vem5IODl3RkNNY2o%3D%2F

Don't know if this happens on the PieFed side or after federating to Lemmy