"She has complied with the part of the order [causing the suspension]," Kaplan says. "I expect that visitation will be reinstated."
The document released Thursday stated, "[Spears's] visitation with the minor children is suspended pending [her] compliance with court orders."
A Spears source gave more insight into the decision, telling PEOPLE Spears was unreachable for court-related calls due to bad reception at her Malibu home. Despite repeated attempts to reach the singer on her cell phone, the source says Spears "waited" but "it never rang."
Kaplan, speaking to PEOPLE Thursday as he was leaving dinner at Katsuya restaurant in Brentwood, also confirmed that Britney and Kevin's 730 evaluations – which involve a third party assessing the quality of parenting and making observation-based recommendations regarding the final custody arrangement – have begun.
Therapy SessionsAs for the co-parenting therapy sessions she and Federline must attend together: "They are just about to do that."
This latest development follows an endless string of major and minor legal mandates including working with a parenting coach and submitting to random drug tests. After losing her custody temporarily on Oct. 1, Spears appeared and was granted one overnight visit a week with sons Preston, 2, and Jayden James, 1.
According to a source, Spears is currently doing "fine."