Well, I don't have a Pacman, but I think generally Frogs & Toads are quite fond, if not tolerant, of leaves and it provides them with a sense of security if they feel scared or just want a place to sleep privately.
When you say impaction, you mean incase he digests it? My frogs always take a chomp out of a leaf if the pursuit of a roach, but they usually spit the leaf matter out and somehow keep the roach in... But I think it could be harmful if he ate the whole thing, because to my knowledge, most frogs only eat and digest living matter, although the Giant Marine Toad[Cane Toad/Bufo Marinus] is an exception, eating dead & plant matter as well as numerous other things.
Someone with extensive knowledge and experience with these frogs would know better, but I don't think he'd go after it on purpose and digest it.![]()