+1 it would be great to have a thorough browser support article on the KoBo support site.
Tiny admin thing - I looked at the page refered to above https://support.kobotoolbox.org/troubleshooting_webforms.html but the “see here” link goes to an archived version of enketo github that’s no longer in use.
Suspect that link should now go to https://enketo.org/faq/#browsers (or possibly to the newer enketo github repo or to https://enketo.github.io/enketo-express/tutorial-70-browser-support.html ) Cheers