Baby leaves drying out?

I have a calathea in a humidity and temperature controlled vivarium. When I planted it in there some of the leaves crisped and died back, expected from shock of replanting, fine. But then 10 new leaf shoots popped up, was very excited. But now the new leaves are crisping and dying off before they can unfurl? Any ideas as to cause?

I originally quarantined and preventatively treated for pests. The plant gets 12h light/UVA/UVB on a timer. Soil stays moist and humidity 80%-90%, temp 25-27C. Help! 🙁

by HaVoCensures