Just wanted to update this thread with a solution that worked for me. Changing the first layer height didn’t really change anything. I noticed that the bits that were welding to the plate were basically the “brim” around the support structure. So one thing I did was change Support tab/Initial Layer Expansion to 0mm instead of 2mm. This eliminated the “brim” around the support structure, but it actually caused the support to lift off the plate in the middle of the print. So next I changed Support tab/Initial Layer Density from 90% to 100% and this made the initial layer support stick well to the plate without coming off, but easily removes when the plate is cool after the print.