String field (of Max Length <= 255) is showing up as "Multi Line Input" on the form. - Support and Troubleshooting

String field (of Max Length Description  Single line text field having set as string field on the dictionary level with max length less than 255 appear on the form as multi line text fields.

The fields experiencing the issue looks like the below image:

Resolution Open the dictionary record of the field and add the attribute "is_multi_text= false" to the record.

Additional Information Please refer to the Known Error article KB0690810 for more on the issue:

https://support.servicenow.com/kb_view.do?sysparm_article=KB0690810