Hello
Did you manage to sort this issue out? I am having the same issue where some fields are missing the data when viewing the record via the inbox. The data is still recorded in the record though, so I know its not gone missing.
Annoyingly, the missing data isn't constant between forms.
1) all forms are missing the same field called CAR details
and
2) some forms have missing fields which vary between forms
The only consistent things is that always a text field
I have looked at the xml file and I can't see anything obvious. The fields all have settings -text - multi line - fieldlength of 1000.
Its a very simple form with only 14 records so far.
I have just noticed something weird though. If you view the form through ArcGis Survey123 website you can't see the field. However if you go to edit the survey form in the website, you can see the field. The field missing is called Description of the non-conformance. Not sure if this is a problem or not.