I've been told that Australian publication That's Life! are filtering in a new 'all rights' contract (I've seen a copy), which must be signed before any further payments are made. Apparently this applies even if you submitted your work and had it accepted before notification of any change.
If you write for this publication, and wish to know what rights are required before you decide whether or not to submit more work, then I suggest contacting the fiction editor to clarify the situation. I've done that and am awaiting a response.
Doing this isn't 'rocking the boat' or causing a fuss. It's perfectly reasonable to want to know the terms under which your work will be published.
I'd like to think that if enough writers demonstrate they care about this issue then the publisher might reconsider, or at least make their new policy known to all their writers, so they can make an informed decision about whether or not to submit. It's worth a try.
Updated 10/2/20 The query I sent, over a week ago, about the new contracts has not yet been answered. I've also heard from a writing friend who was issued the contract and hasn't had all her queries answered. Quite rightly she's not signing without knowing exactly what she would be committing herself to.
Updated 11/2/20 The editor can't help me as she's not seen the new contract. She offered to pass my query to the editor, so I'm noe awaiting their response.