New mass-edit: is there a record limit?

[Guido1982]

Frankly I don't think it's the JS error. I thought the same thing at first but then I checked the other tab, that did start the mass-edit: it had the same JS error in the console. Or did you not mean the serviceworker error? I think I remember something now, the max. POST size of javascript like you said. That may very well be the issue yes...