This issue is not reproducible in the current version of ArcGIS Survey123. If experiencing the behavior described in this defect, contact Esri Support Services for further investigation.
解决办法
Filling out the survey from the web form or using the field app on the Windows personal computers does not reproduce the issue.
Filling out the survey from an Android device does not reproduce the issue.
Removing the field-list appearance settings from the survey's XLSForm reduces the lag's impact.
Removing the questions with the position(..) function removes the issue.