Bangladesh Assistant coach, Ruwan Kalpage, has been instructed by the Bangladesh Cricket Board to return to work immediately.
The former Sri Lanka international is the only member of the backroom staff yet to report for work in Dhaka after the team's break.
Sources close to Kalpage have alleged that he has requested additional time off, but the BCB have denied this request.
BCB chief executive Nizamuddin Chowdhury said: "He [Ruwan Kalpage] told us that he wants to take time, but we have told him to join immediately,
"All the Bangladesh coaching staff have already joined work. We feel that his claim isn't the right assessment of the situation."
It is believed that security concerns are behind the delayed return, however head coach Chandika Hathurusingha, fielding coach Richard Halsall, and strength and conditioning coach Mario Villavarayan have all returned to work after being granted additional security.
Hathurusingha commented: "I think he has spoken to the board.I have spoken to him. He will make that decision very soon."
Kalpage has been a part of Hathurusingha's support staff since 2014 and was recently given a contract extension until after the 2019 World Cup.
The Sri Lankan has yet to respond to media invitations to comment on his absence.