Within the board side bar issue view, multi line text custom fields values are overlapping the field box limits when collapsed.
The text is collapsed to fit on a line and overlap the input field. The field content is continuing at the right of the pencil/edit button where it should be hidden as out of its field's right limit. The edit pen still appears, but it looks nasty, because the text continues under and overlap on its right.

Workaround:

• Use the New JIRA Issue View
• Use another View