i had the same thing happen with a female Rhacodactylus ciliatus... and i attributed it to a calcium crash, she was also rolling around on the ground while seizuring and i'm amazed she didn't die. she would almost lock up, and bite down really hard and it was hard to watch.
her eggs were also undercalcified after she laid the next batch, but they still hatched.
i got her to lay off for a couple of months and supplemented her with calcium a bit more and she's laying again successfully. this was before i got her on the CGD and i haven't had any problems with my animals since.