The Clear button does not remove all characters from the answer when there is an input mask with non-alphanumeric characters in the question in ArcGIS Survey123.
This issue is not reproducible in ArcGIS Online. If the issue occurs, contact Esri Support Service as additional information is required for further investigation.
解决办法
Remove the constraint.
Remove the input mask.
Remove any non-alphanumeric characters in the constraint or input mask.
Use the Backspace key to clear the input instead of the Clear button.