To support features like prefilling, pages that can use URL parameters (eg. https://test.wikipedia.org/w/index.php?title=Wikipedia_talk:Sandbox&action=edit§ion=new&preloadtitle=Incident%20Reporting%20System%20report%20from%20{{subst:REVISIONUSER}}) should be considered valid and supported.
Possible solutions are: 1. Don't validate pages; assume user will 2. Add parameters as another input and combine the two on render.
Change #1275807 had a related patch set uploaded (by STran; author: STran):
[mediawiki/extensions/ReportIncident@master] Add support for query parameters in links
Change #1275807 merged by jenkins-bot:
[mediawiki/extensions/ReportIncident@master] Support URLs in any "help method" configuration that takes a Title
Change #1275893 had a related patch set uploaded (by STran; author: STran):
[mediawiki/extensions/ReportIncident@wmf/1.46.0-wmf.24] Support URLs in any "help method" configuration that takes a Title
Change #1275893 merged by jenkins-bot:
[mediawiki/extensions/ReportIncident@wmf/1.46.0-wmf.24] Support URLs in any "help method" configuration that takes a Title
Change #1278356 had a related patch set uploaded (by STran; author: STran):
[mediawiki/extensions/ReportIncident@master] Finish implementation of URL support in help methods
Change #1278356 merged by jenkins-bot:
[mediawiki/extensions/ReportIncident@master] Finish implementation of URL support in help methods