It's because your gig out from different searching algo.
Sometimes it happens when your gig active but disqualified because of quality [as Fiverr suggested]. If your single gig disqualified it affects on whole account gigs, and they all disappear and kicked back to the end of searching pages.
It's Fiverr end bug.
Normally gig disqualified/qualified 2,4,8,18 date of every month.
Excepting wait, no solution.