Last week eagle-eyed social media users spotted something amiss on the Darwin-born songstress' feed earlier today as it appears she has deleted all posts to date.
The move has baffled fans as Jessica boasts a significant following of 326,000 and is usually active on the photo-sharing platform.
The revelation comes just weeks after Jess shared a rare photo with long-term boyfriend Themeli Magriplis to her Instagram story.
Engagement rumours swirled last November when 29-year-old Jessica was photographed sporting a massive diamond ring on her left hand walking the red carpet of the 2018 ARIA Awards.