Gotta get my oar in the water here. I was in evangelical churches for about 20 years. Most of these churches tend to be non-denominational or members of a loose affiliation with each other. (I am a revert - cradle Catholic to pagan to evangelical to Home again

! ) I was told as an evangelical - once saved always saved. HOWEVER individuals within the church did not always totally subscribe to that. Remember most people in evangelical churches come from some denomination or other. What I heard from others at times, and believed myself was that a habitual sinner would not get a free pass, or as was mentioned here, was never saved to begin with.
So as I understood this:
Habitual sinning = considered serious sin as a Catholic would define it in this circumstance, though they would not consider everything a serious sin that we would.
So this would be things like spousal unfaithfulness, abuse, stealing, etc. If these sins continued and were not turned away from and repented of (of course we ALL sin - it was more the nature and severity of the sin and lack of repentance) it showed they weren’t saved to begin with, because coming to Christ involved repentance and a willingness to change your life and turn from sin, to being a disciple. If you still embraced sin or returned to it, without then turning back to Christ for forgiveness, it implied you either 1) didn’t know what becoming a Christian meant to begin with, or 2) you may have wanted to become a Christian for a number of reasons (pleasing people, liking the Idea of it, etc.), but not for the right reason and never had any intention of paying the price to follow Jesus to start with.
To be fair, although official Church doctrine is established (Church dotrine is PRIMARY of course), I have to say I have been in some Catholic churches since I’ve returned to the Church where they could never be accused of zealously following the magisterium! So I’m thinking just as all Baptists, Lutherans etc. aren’t the same tho there is an official doctrine in their church about some things, you could say the same thing about many Catholics - not saying that’s GOOD - but true I think. *We *appear to be confused and contradictory to many Protestants because so many Catholics don’t follow our Church teachings - ex. priests not supportive of official Church teaching, politicians who vote pro-choice, to the many Catholics who poo-poo contraception, etc. and appear to feel God won’t take any of that into account when we die. If these are the only type of Catholics you run into - and sadly there are lots of them - it would seem to me Protestants could almost consider us “faith only”!