The Survey123 web form (embedded in a model dialog in a VUE app) is cut off and the user has to scroll within the limited portion of the window

It happens across all browsers - but was displaying correctly yesterday. The underlying code has not changed. I have republished the survey with 13.12 but that has had no effect.
Additional info:

The i-frame created by the Survey123webform is restricting the height of the survey123 content to 150px even though the container div is set to height:100%
