It is possible that the higher storage fees for specific tokens is due to a caching issue after Ithaca. Caching is a process of storing data in a temporary location so that it can be accessed faster. This data is usually stored in a separate memory location, such as RAM, and can be quickly retrieved when needed. In the case of Ithaca, it is likely that the data related to specific tokens is being stored in a separate memory location, which could be causing the increased storage fees. This could be due to the fact that the data is being accessed more often, or it could be due to the fact that the data is not being stored in the most efficient way. In either case, it is possible that the higher storage fees are due to the caching issue after Ithaca.