Hello, I am pleased to have the opportunity to assist you. My name is ***** ***** I can help you solve your problem.
As an electrical engineer and a hardware troubleshooting expert, I can tell you that if you have replaced the Bluetooth keyboard twice without having any impact upon the problem, the conclusive evidence is that the problem is with the Bluetooth circuits on your tablet, which are not operating within specifications.
I regret to have to be the bearer of bad news, but from my personal experience with Bluetooth, it is a technology which is quite sensitive to equipment variations and produce cycles. Basically, it works when it works, and it doesn't when it doesn't, and there isn't anything that you can do about it.
If you are satisfied with my advice, I would appreciate a Good or Excellent rating. If you have questions or are having problems, please let me know, so that I can provide you with the additional support that you need. Thank you for giving me the opportunity to be of service. I ONLY GET COMPENSATED FOR MY TIME AND EFFORT WHEN I RECEIVE A POSITIVE RATING!