how to prevent sharepoint from decoding a URL with %2F embedded

I add a link like this:

https://example.com/Saba/app/shared;spf-url=common%2Fledetail%2Fcours000000000054432

I publish it, and click it, works fine. (once)

THEN

I reload the page and the URL has been changed to: 

https://example.com/Saba/app/shared%3bspf-url=common/ledetail/cours000000000054432

which will not work on the SABA site. 

webparts used: text, button, highlighted content, quick links...