Help! Why is my JPXI can't stay in tune?

[Jom Tanakrit]

I used to own JP6 and JPX-6 and they were great guitars!
I bought JPXI-6 about a month ago and it was easily went out of tune. At first I didn't take it serious because I thought the strings might not be fully stretched. So I gave it a time.
Later on, it still easily went out of tune. For example, bending strings 1 full step or 1 1/2. It was worse when using trem.
Yes, the guitar is perfectly set up. 5-6 days ago I put on new set of EB strings, played it, stretched it and still easily goes out of tune until today.
I find this uncommon because my previous models had no tuning issues and they were perfect. (I can roughly play with the trem and they're hardly went out of tune)

I love this guitar but this shouldn't happen, right? =/

I appreciate every comments!

 

[DrKev]

This sounds like a job for...

Customer Service!!

Give them a call.

 

[dhamaker]

Try using chapstick. Using a toothpick, apply to nut grooves and even the tops of the saddles. You don't need much. Also apply to the surface area just behind the saddles. It’s that area the string makes contact with where it comes out of the body

Try this first before making any significant changes/repairs to your guitar. It’s too easy and costs virtually nothing!! It help me out tremendously.