To start: I'm playing on a PS4 with 2 accounts. Account A has PS Plus, account B doesn't. I'm playing Destiny with account B.
Since the beggining I've been able to play everything (even Crucible etcetera) even without having PS Plus. I thought it was because of account A on the same Playstation device.
But yesterday I started playing and all things that require PS Plus were locked. Why's that? I was facing a bug before or am I facing a bug now?
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Edit: I've been playing everything (even Crucible) since I bought the game around Christmas. The problem with the content blocked because of PS Plus appeared yesterday.
Account A is set as the main PS4.
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The reason B would have been able to use PS+ only content before was most likely because A had activate the PS4 as their home console. You may want to check that that is still true.