Preventing Bluetooth from going to sleep(?)

Hi

I have SLIMM 1.9 installed and I use it quite a lot with my MI Band.
The problem is that once the phone goes to standby, the band loses connection and starts vibrating randomly.
It's important to me as I want to use it's vibrating alarm clock.
I disabled MII FIT from the Battery Optimization menu but still no dice
How can I fix this?

Thanks

from xda-developers http://ift.tt/231Cdiy
via IFTTT