Why is Loading on mobile/android too slow at First run when PSU Caching (4.27.1) is used

Hi,
please help, I used PSO Caching and everything is fast and fine except First run. First run is too long (half a minute min.) on good mobile device. Later , next run of the Game is super fast.
I would appreciate any help.I tried with different oodle options but it is not related to it.