I did some testing locally and found a few things to try and have listed them below.
1. The EXACT keyword wouldn't allow HTTPS. This only worked for HTTP.
2. Use Microsoft Edge in the newest version of Fiddler, 5.0.20194.
3. Close and reopen the browser upon changing rules.
Note that this can be tested against any website. I recommend trying the rule against another website like, www.google.com to verify that it works there. If so, this may be an issue with the Application.
Lastly, if the session publicly routed, i.e. if the request is passing through because it is bypassing the rule, then unplugging the network cable will stop Fiddler from processing the session.
Please give these items a try and let me know the results. Thank you for using Fiddler.
Eric R | Technical Support Engineer
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items