Bluetooth keyboard connection

I have intermittent issues with connecting my Bluetooth keyboard to my iPad Pro. I am on my third keyboard thinking that the fault lay with the keyboard. The latest keyboard is a Logi keys to go that I purchased on Apple website. Still have issues with connection.

it seems every time I go back to using the keyboard after a little while of not using it, I have to restart the iPad, remove the device, and then add it again. This should not be necessary and is driving me nuts. How can I fix this?