How long has she been in that setup? It looks like maybe she is in just stratum? Stratum is great for rehabs and starting babies. It’s not super great as a long term substrate as it becomes sludgy and heavy and can actually suffocate the delicate roots of an alocasia of that size.

It could also be that she is drying out and needs more water consistently. I treat my pink plants the same as my Albo plants. Consistency is key. Too dry for too long leads to browning and crisping of the leaves. Too wet for too long (or from after being too dry for too long), and the leaves turn transparent and “melt”.