I already submit the ticket for this but I am posting a topic for others may have the same issue.
I logged off about 05/28 15:08 EVE time and I back to log in today 05/29 13:33 EVE time.
I was surprised that my entire skill queue were gone today somehow and no skill was on training.
I checked the login history from Account Activity page and confirmed that there was no activity until now.
There were plenty of skills on the training queue for more than 300 days remains and now its gone and no skills is under training.
The only thing I remember was that Master Cerebral remaining timer was mostly 2 hours left. I am suspecting that this might affect on this issue?
I hope CCP will investigate and solve this issue soon.