I'm planning to build my e-gravel with this group.
Would you mind to explain the known issue(s) of the group, as there are already 30+ pages.
The "dielectric grease" intrigued me
The number one issue (and admittedly my only one) is water ingress. On my first set, after the first ride, I already started having issues. Note that I live in the enticingly moist Netherlands. After ride nr 5, I decided to add duct tape to the connections, which temporarily seemed to resolve all issues, until the 31st of Dec, when the rear derailleur died on me mid-ride.
The duct tape is not a full fix, and I personally only have one ride with the dielectric grease setup, but the latter solution seems to work for many people having this set.