I recently updated to Collector 10.4 and found a potential bug. We have a web map with three layers and three related tables. The related tables have text fields that our field staff often use in their data collection. Field staff can create records with no problem, add text to text fields and save. They can edit and change the text but if they want to clear the field (delete everything on that text field) they cannot click 'Done'. Users need to leave a character or a space to be able to save their edits.
Is this a known bug?