Today, WEBZEN has announced the postponement of the next planned server maintenance on the official FlyFF Discord server. Originally scheduled for 08/04/2020, it is now supposed to take place a day later, on 08/05/2020.
The reason for this delay seems to be the current problem with the new wings. Transmuting them onto a cloak leads to the visual effect disappearing after a short while in many cases. Developer Gala Lab is aiming to provide a fix for this problem with the next server maintenance. They just need a bit more time to implement it.