It’s enough to get concerned. Sometimes it’s not just enough being on the front page. Do consider some of these and see if there’s an action you may need to take.
Was they a change of position of your gig in the front page–from up to down? Such can affect.
Did your gig just move closed to other gigs offering the same value like you at same price but have better star-rating than you?
And also very important, what was the nature of the last buyer review(s) on your gig? Could it be deterring potential buyers. Clients don’t often scroll down for more review, majority tend to judge from the few on first display. So what these say about your gig matters.
If you fall short in any of these, you may consider doing an appropriate fix.