A CBSA agent will not ask you when you're travelling back, you have freedom of movement and have no obligation to report your future travelling plans.
They could ask you, are you coming to settle permanently? This is when you would have to mention soft landing. But this is rare, unless the agent has a reason to believe you have unresolved commitments in another country. And even then, it's very unlikely that a border agent would deny you entry.
But the chances of one asking you about this is very rare, what you shouldn't do is volunteer information about soft landing, because this might make them question your intention to settle permanently.
Always just say, i'm landing as a permanent resident. Only talk about soft landing if asked directly about it.