I have asked the same question on the x98 Pro page at Gearbest, and they answered:
Your original question is “Has the overheating problem in the x98 Pro been fixed? Does it overheat in Win 10 only, or in both Win10 and Android? Thanks.”
Here is the answer from Our Customer service Team:
“
Hello,
Thank you for your inquiry,it has been fixed.Have a nice day.
“
But I am not sure I’m convinced. It is so laconic that it doesn’t really ring true, but more like “yeah yeah, shut up and buy already” :).