I decided to make this a separate post. So, after some reading and recollections a few things come to mind:
First, I remembered something about treefrogs I read a while back. Many develop favourite spots in the tank to hang out. They may be returning to the same spot for sleeping during the daytime.
This brings me to the next part. Multiple resources have suggested they are completely inactive during the daytime. I would suggest monitoring them at night.
I've read that care for these frogs is similar to Red-Eyes, so Ive been reading up on them too since info on tiger legs seems a bit sparse. Good luck.