Q: lost bluetooth keyboard after wake from sleep in 10.10.3

Since 10.10.3 i have bluetooth errors i had never before with any Yosemite Version.

My machine is a mac mini 6.2.

i had set hibernation mode to 25. This worked in mavericks an yosemite before 10.10.3. If i set my machine to sleep, wait i while and then wake from sleep

my bluetooth keyboard is lost. I was not able to type my password anymore. So i conectet a wired keyboard to have accsess.

Now i went to the bluetooth configuration. It showed that my keyboard was connected but ii did not work. The only thing helped was restarting the machine.

After that my bluetooth keyboard worked fine, but after restart shift key to select boot drive was messed up.

The only thing to bring the mac back was a smc reset. The everything went fine.

If the mac goes again to sleep the same happend. I have to do all the steps above to bring the mac back.

10.10.3 is the worst yosemite update. What in the **** happend there ?????????????

Kindly regards Woody