It seems reasonable to expect fewer muting problems if you and your moderators
resist the urge to merge (or split), and edit message subject lines with a
lighter hand.
Our merging activity is limited to those replies that the system fails to recognize as belonging to the relevant topic due to the prefixes problem (I have reported this to support).
At the same time, it's my experience that few subscribers
actively use the muting function.
Actually, in my group just one member complained about the muting function, so far.
Thank you for your explanation,
Marina