Repeat stain
A stain that returns is the building telling you the path is still open.
Paint, a new hose, or a new caulk line can hide a leak for a month. The same ring coming back is a pattern. Treat it as unfinished, not bad luck.
By ProShield Leak Detection Inc. · Updated

Put the old photos next to the new ones.
Same ring, same room, new date. That is the packet.
Ask what was actually repaired last time.
A new shower head does not fix a valve in the wall.
Do not paint it a third time as a test.
You already have the test result.
Questions people ask
Could it be a new leak in the same place?
Sometimes. Either way, the path is known enough to investigate properly.
Should we open the stain now?
Not as a first move. Investigation should still aim at the least opening that names the source.