That’s super helpful, I’ll give it a try! You are a lifesaverHe could be 'on alarm' from the upheaval of the environment.
Sometimes putting a frog or other herp in a container to feed causes them to be distracted from feeding.
Another way to do it is to keep a wide crock in the living environment in a good view point for the frogs. I like to put a perching branch or a stable 'patio' feature beside it to make it nice for them. I also like to put a smear of moist fish flake dough to keep the feeder insects nourished and occupied.
Its important to keep it clean. I have advised people to put the crock on an identical one, over turned and flush with the actual floor, to provide a clear platform for the feeding crock. This prevents variables in setting it back, so that animals dont try to burrow under an irregularity beneath the heavy artifact. Preventing a freak accident. It also raises it which can make it easier for keeper to reach and return clearly in some tanks and set ups. Hope that helps.