404 Error - when save product

[bidaodong]

Hello guys! This is my first post and sorry for the bad English   

 

I had an error when saving the product page, when I clicked save and it return the 404 Error. I found out the strange thing that is when the description is begin with letter or alphabet then the 404 error happened. If I add a symbol or a space at the beginning of all lines then problem solved.

 

This problem happened after my lunch time   before that I still able to save the product without any error.

Please help me... I'm going crazy right now! It's already 2 days!  

 

 

PS1: Weird.... After I post the problem to the site and now my problem solved..... 

Edited November 7, 2016 by bidaodong (see edit history)