The Reds were held to a 4-4 draw despite leading 4-1 at half-time and 4-2 with eight minutes to go.
It leaves them two points adrift of Bristol Rovers and Northampton Town, though they do have a game in hand.
A gap has now opened up leaving the bottom eight sides adrift and a fight to avoid the bottom four places.
Crawley are currently rated 11/10 with SkyBet to be one of those sides who play League Two football next season.
So where will the Reds finish this season? This is how a supercomputer – run on behalf of SkinLords – expects the League One season to finish.
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1. Birmingham City
100pts (+40) Photo: Getty Images

2. Wycombe Wanderers
98pts (+46) Photo: Getty Images

3. Stockport County
88pts (+26) Photo: Getty Images

4. Huddersfield Town
87pts (+29) Photo: Getty Images