TYPO3 Core

I've the following:

https://domain.net/ : works
https://domain.net/?id=1&L=0 : works
https://domain.net/index.php : 404
https://domain.net/index.php?id=1 : works
https://domain.net/index.php?id=1&L=0 : Redirect Loop to https://domain.net/index.php////////////////////////////////////////?id=1&L=0

tx_solr do not work with speaking sites yet, it uses the id schema https://domain.net/index.php?id=1&L=0

Patch set 1 for branch 9.5 of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/60512

Hint: The mentioned redirect loop is fixed with https://review.typo3.org/#/q/I0457c48640d6b47a0947ed5115a96cf73cc97d81

This does not work, if the scriptname looks like "typo3/site/public/index.php"
ltrim remove only a trailing "/", but we need the last segment: "index.php" to find and replace the scriptname.

I test with
$scriptName = substr($normalizedParams->getScriptName(), strrpos($normalizedParams->getScriptName(), '/') + 1);
and this works in my installation.
The resulting $urlPath is empty and that should be the "starting page".

Or simplier:
$scriptName = basename($normalizedParams->getScriptName());