Same issue for my Pro Max 12 leather case. It's really annoying when the button unknowingly goes into silent mode and causes me to miss a call that is important.  When I called Apple Support to complain, they claimed that they hadn't heard of this issue.  I think that enough of us call in to register a complaint, they might start to issue refunds even if it is past the return period.
The new case they sent as a replacement has a same problem. One layer of double-sticky tape hasn't been enough for me.
	
		
			
		
		
	
				
			The new case they sent as a replacement has a same problem. One layer of double-sticky tape hasn't been enough for me.