This only applies to the one design that puts your words ON the photograph. The other two put them in a panel beside the picture, where there is nothing to avoid, and Before/After does the same — so there is nothing for placement to decide there.
A sky, a wall, a table top, a road. Your headline will go there. A picture that is busy from edge to edge has no calm third, and in that case nothing moves — which is the right answer, not a failure.
Same photo, same words, same design — the text is simply somewhere better. You did not switch anything on and there is no setting for it in the composer or the brand kit. A switch for "put the text somewhere sensible" is a switch nobody should have to find.
One line tells you the text moved and why. Press Put it back and the design’s own placement returns, permanently for that post — nothing re-measures it afterwards. It costs no post, like every other edit.
Both worth knowing before you trust it with a portrait.
The photograph is split into three horizontal bands and each is measured for how much is going on in it. A sky is almost nothing; foliage, a crowd or a shop front is a lot. The words go in the quietest one — and only if it is clearly quieter, so the text never shuffles about for a rounding error.
A face against a plain wall is a CALM part of a picture, so that is the case this gets wrong. We could buy an AI vision call that sees faces; we have not, because fewer than one post in ten carries a photo at all. If people press Put it back often, that is the evidence that buys it.
It picks a band rather than a pixel position, so the same choice works at 1:1, 4:5 and 9:16. A coordinate that is right for a square is wrong for a story, and your square and your story would then disagree — which is the exact drift the editor exists to prevent.
One photograph, one headline, two places for it to land.
The headline sits where the layout puts it, which here is on top of everything in the picture.
Same photo, same words, same design. The text moved to the emptiest band that still fits it.