Ben Affleck was apparently not feeling quite like himself when he reunited with Jennifer Lopez in 2021. RadarOnline.com can reveal a source close to the Gone Girl star said Affleck was suffering from a bout of “temporary insanity” when he got back together with J Lo nearly two decades after calling off their first engagement. Lopez and Affleck’s reunion rumors began in May 2021 when they were spotted on a romantic getaway in Montana. A few weeks later, media outlets everywhere reported they were officially back together. The Jenny From the Block singer was said to be “crazy about Ben” at the t…