My probably pretty premolt Pulchra (abdomen top is black, around is dark grey, everything else is dark brown, and bottom is light brown) has acted strange since its last feeding. It had been out of its hide in the in the hunting position, so I decided to feed it a cricket. The cricket was normal size, not too big, not too small, but the Pulchra couldn't catch it. It pounced, but let go and the cricket got a way. Same happened the second time, but third time it caught the cricket. Is this a sign of something?