Images of hungry and thirsty Rohingya huddled on boats have stirred memories of a 2015 crisis, when thousands of fleeing Rohingya were stuck at sea as a trafficking trail south collapsed.
Some 120,000 of the stateless Muslim minority have languished in camps in central Rakhine for six years since a bloody bout of intercommunal violence with ethnic Rakhine Buddhists.
The end of the monsoon brings more favourable, if still treacherous, sailing conditions for those desperate to escape the camps that are branded as "open-air prisons" by rights groups and where Rohingya have little access to work, education or healthcare.
They are in "acute need of support" now they are back in the camps, she said.
Journalists are not allowed to enter the camps except on brief government-chaperoned tours, but Rohingya there told AFP by phone that many also sold their food ration documents.
"They have nothing to eat," one Rohingya in Thetkal Pyin camp said, asking not to be named.
"They can't get their money back from the traffickers."
A leader in nearby Dapaing camp confirmed that the escapees had paid up to USD 700 for their places on the flimsy fishing boats, often in the hope of reaching Malaysia or Indonesia.
So far five boatloads are known to have set off from central Rakhine, including the group of 20 men who made it to Aceh.
The four other boats were picked up in Myanmar waters between November 16 and 29 and carried between them a further 356 people, who have since been sent back to the camps.
There have also been rumours of sightings of several other vessels.
But fears that the number could escalate to 2015 levels are for now overstated, said Chris Lewa from the Arakan Project.
The circumstances are "completely different" now, she said, pointing out that the Bangladeshi authorities have so far also prevented any mass departures from the camps there.
"This time we don't have any big boats leaving at all," she said.
"These places are big and we can't control everywhere," he added.
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