CLEVELAND — Just when it appeared the Cavaliers’ chaotic summer had calmed, there’s a flare-up.

That blockbuster deal between Cleveland and Boston is stuck.

The Cavaliers have some concerns about guard Isaiah Thomas’ health and are doing a “deep and thorough” review of the deal that brought him over from the Celtics, two people with knowledge of the situation told The Associated Press on Saturday.

On Tuesday, the Cavaliers rocked the NBA by honoring All-Star guard Kyrie Irving’s trade request and dealing him to the Celtics — one of their biggest rivals — for Thomas and a lucrative package that included an unprotected 2018 first-round draft pick.

The two people said the trade has not been completed and the Cavs are continuing to do a medical evaluation on Thomas, who injured his right hip last season and had to drop out of the Eastern Conference finals against Cleveland. They spoke to the AP on condition of anonymity because the team is not publicly discussing its plans.

After Irving demanded to be traded in July, the Cavaliers entertained numerous offers before striking a deal with Boston. In exchange for Irving, the Celtics agreed to send Thomas, forward Jae Crowder, center Ante Zizic and the first-round pick they acquired from the Brooklyn Nets to Cleveland.