recreation.gov wilderness permits sell out in a few seconds?

Hi there,

I am trying to get a backpacking permit and was bewildered this morning to find that all of the permits for the trailhead sold out within less than a minute. Literally by the time I clicked "reserve" they were gone. Does anyone know why this happens and have tips to deal with this? Are people using bots to get permits? Do you have any strategies that work for you?