Submitting a record in the text field of a survey with double quotes triggers an error in the HTTP module of Make (Integromat) with 'backslashes' before double quotes when submitting from the ArcGIS Survey123 mobile app for Android.
This is not a bug with ArcGIS Survey123.
Straight quotes (") in JSON strings are required to be escaped by a backslash (\). One way to achieve this in a module in Make.com is to use the replace() method to replace " with \" in a JSON object. Another method is to use the built-in JSON module, which automatically escapes special characters.
The discrepancy reported here between operating systems of Android and iOS submissions from ArcGIS Survey123 can be explained by the fact that the iOS keyboard uses smart/curly quotes (“ ”) by default, which do not break strings in JSON. When straight quotes (") are entered on the iOS keyboard, the same result appears as ArcGIS Survey123 mobile app for Android.