Device Name

Why is a dash - ok to use in the devce name in firmware 2x but not in fimware 3x. I have multiple units.

IE BR-WDTVLIVEHUB could be assigned in 2x & is working fine but if I try to rename another one in 3x it tells me I can’t use the dash.

I have not notice this, I need to make some test, but if is the case, it is an inconvenience.