This is because, there are substantial differences between the two.
The Nicehash miner has always allowed more than one instance to be run.
Therefore, there is nothing to complain about, unless you think both are identical.
i can run 2+ instances of this miner without problems, what you are talking about exactly?
I presume he was speaking about threads, because like you i can run multiples instance (several bat files for selected gfx cards) no problems
So I will go back to ver 08 waiting for ver 09.x.
Or... start an instance of EWBF and Nicehash side by side. That way they share the rig 50/50 and if one crashes the other picks up the slack.
You get paid in BTC but at least you do not waste any sols if it happens while you are away.