In case you have such an issue, and verify that you don’t call
history.push() 2 times, check your content for an
TL; DR: React tries to minimize re-rendering and will reuse the iframe element by just changing its
src. This will update the history object, which is apparently shared with the main page (and would need to press the back button multiple times).
The solution is to add a unique key to the
iframe (I used the
src URL itself)
Here is a blog post that explains the issue in-depth: