Search strings with / don't find anything

This is a consequence from VuFind 5 / Solr 7

Old behaviour : http://newsource.swissbib.ch/Search/Results?lookfor=numerical+%2F+quarteroni&type=AllFields&limit=20&sort=relevance 103 results

New behaviour : https://www.swissbib.ch/Search/Results?lookfor=numerical+%2F+quarteroni&type=AllFields&limit=20 0 result

I guess the cause comes from this pull request : https://github.com/vufind-org/vufind/pull/1182