This looks like a pervasive problem, not a random bug on a single site. I have the same problem as the OP: too much space between the short version of the text and the More button.
Like the OP, the More button is touching the bottom of the text box. Screenshots below. Live site here: https://lucyisabel.wixsite.com/ratherapy
The problem negatively effects user experience because the section with expandable text should be narrow.
Wix people, will you help?
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Code:
Screenshot of the problematic extra space:
