TBH, I can't remember now. All I know is that I have both a galaxy Tab A tablet and an S10 phone, I don't use the samsung keyboard (or any other Samsung apps generally), and I never see any messages like that. I currently use Gboard on my phone, Swiftkey on my tablet.Well, feel free to tell me how, because t'internet's heaving with people bitching & moaning about it - it is 'a known issue', in spades - and I've yet to see anyone suggest a solution, short of rooting the phone.
I have bixby as turned off as I can on the phone - I never use it deliberately. I don't know if that makes a difference.