I'm running EN v10.7.6 on MacBook Pro Big Sur v. 11.1. I'm having the same problem. I've been a "Premium" member for 9 years. The version 11 isn't any better. Extremely slow, constantly downloads double notes copied from web via Web Clipper, blank pages.....IT HORRIBLE....
Anyone have an ALTERNATE suggestion....I'm ready to give EN the BOOT!!!!