As you know pre-print services (such as Research Square and etc) were newly developed and when a researcher submit a manuscript, journals encourage them to publish it as pre-print.
Imagine that your manuscript was rejected by the first journal, and your manuscript is published as pre-print with DOI. Now you want to submit to another journal. In first step of manuscript evaluation, your manuscript did not pass crossref check because of high similarity index (Plagiarism)!!!! and this will be with your manuscript.
The pre-print services also did not remove your manuscript even though on your request!!!
What is your opinion on this issue?