BGR reports, Calcalist, the Israeli newspaper that first broke news of Facebook’s plans to acquire Waze for approximately $1bn, has followed up its original report with news that the two companies are having problems coming to terms in a few key areas.

The biggest issue, explains BGR appears to be Facebook’s desire to shutter Waze’s Israel-base research and development center and transfer several key Waze employees to Facebook’s U.S. headquarters. BGR adds that according to the paper’s sources, Waze CEO Noam Bardin and company founders Ehud Shabtai, Uri Levine and Amir Shinar insist that the firm’s main R&D center should remain operational and they want to keep all of their employees in Israel.