

These are the dongles that came with the keyboards, so they’re paired out-of-the-box (although I have also used the process for re-pairing them). They are just connected to a USB port on the computer, so not really permanent, but I do leave them connected. Not both at the same time, but each in turn. Hope that answers your question, but I’m not 100% sure I understood it.
I emailed support about this, and they replied telling me they had adjusted some configuration to try to fix the problem. Seems like it was an unintended result of some other change.