Seems that Mueller is not happy about Barr lying about his report:
"Mueller complained to Barr that his four-page letter “did not fully capture the context, nature, and substance,” of the special counsel report, according to the Post. 'There is now public confusion about critical aspects of the results of our investigation. This threatens to undermine a central purpose for which the Department appointed the Special Counsel: to assure full public confidence in the outcome of the investigations,' Mueller wrote in a letter, the Post said."
Justice Department spinning:
"Justice Department spokeswoman Kerri Kupec told The New York Times on Tuesday that, in a subsequent conversation between Mueller and Barr, the special counsel “emphasized that nothing in the attorney general’s March 24 letter was inaccurate or misleading” but that Mueller was frustrated by “the lack of context and the resulting media coverage regarding the special counsel’s obstruction analysis.”
"Mueller complained to Barr that his four-page letter “did not fully capture the context, nature, and substance,” of the special counsel report, according to the Post. 'There is now public confusion about critical aspects of the results of our investigation. This threatens to undermine a central purpose for which the Department appointed the Special Counsel: to assure full public confidence in the outcome of the investigations,' Mueller wrote in a letter, the Post said."
Justice Department spinning:
"Justice Department spokeswoman Kerri Kupec told The New York Times on Tuesday that, in a subsequent conversation between Mueller and Barr, the special counsel “emphasized that nothing in the attorney general’s March 24 letter was inaccurate or misleading” but that Mueller was frustrated by “the lack of context and the resulting media coverage regarding the special counsel’s obstruction analysis.”