Pulldata calculation does not work on mobile browser (but works on desktop and mobile app)

Crinoid

I have a survey with a map question followed by a read-only question. The read-only question just pulls which polygon the submitter clicked on in the map question. When I test the survey on a desktop web browser, Survey123 Connect, or the Survey123 mobile app, the calculator works. However, when I test the survey on a mobile web browser, the calculation doesn't run. I confirmed that after submitting the survey on a mobile browser, the map point the submitter clicked on gets saved (e.g. the feature layer shows a point on polygon 23), but the calculated field is blank (rather than saying "23"). How can I fix this?

Here's the calculation for the read-only question in the XLSform:

pulldata("@layer", "getValueAt", "attributes.Name", "https://services1.arcgis.com/EQOIfJIstOsYk5kO/arcgis/rest/services/City_GeneralPlanSurvey/FeatureServer/4", ${map_point}, "")

 

Thank you!

Crinoid

It was a public layer. Unfortunately I ran out of time to troubleshoot and had to restructure the survey so that the map was read-only with labeled zones, and the submitter would type their chosen zone in a text box rather than clicking on it. Then I learned even that wasn't reliable because the read-only map would only load on the mobile browser about a third of the time. I ultimately had to add the map layer to a new experience and then link to the experience within the survey as a backup for when the embedded map wouldn't load. Disappointing solution but it technically worked.