What does Motorola say about screen burn problem?

screen burn problem for lots of customers using this phone. what is the response gave by the company to this issue so far?

Got display replaced but still having this problem don't know what to do??

screen burning burning problem is hardware issue 

Can't find any official statement about it. Although some users suggest using apps like: 
- Screen Burn-in Tool (link)

- Burn Fix (link)

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