Just a comment here, that these kinds of errors happen from time to time both with the review form and the submission form. It can be like this or you get the error “status true” etc.
I have usually seen them in workshops where I am teaching to use OJS3, but never been able to reproduce them in any browser.
The errors are not browser dependent and usually after getting such error the same user will not get it anymore. This has led me to believe that it is somehow related to browser cache. I mean, in some cases a script is not loaded properly during the first time but the second time you try everything works.
Edit: it is this one: OJS3 moving between steps in submission and review forms sometimes cause errors