Stres":lf9but4m said:Toxic insect list for beardies below if you want to check, I think one should be ok even if it's on the list.
It does mention to keep them well hydrated and to keep their heart correct to aid digestion after consumption.
Hope this helps.
viewtopic.php?f=1&t=226096
Also any chance it could be a black soldier fly, do you feed the dragon calci/Phoenix worms. They have a habit of hiding and then turning from larvae into the fly whilst in the tank and are fine for dragons.