It is entirely possible that shedding has effected appetite. And a day every now and then of less eating isn't necessarily a problem as long as it doesn't last long. You sorted out the UVB already but I would just recheck temps periodically as changes in the ambient room around can effect their temps in the enclosure with changes and it can throw things a little off. Also if the insects aren't moving much you can try making them move more as that does peak interest.