I think my LionMaster Challenger is from around 2000. It was the first issue of the LionMaster Challenger and was supposed to handle 036 curves. And it never game me any problem with them. This year I switched from RealTrax to Fastrack around the Christmas tree and introduced some 036 switches to create a siding and to provide 2 attachment points where I could temporarily expand the Christmas tree layout further into the living room and quickly collapse back down to just under the tree when my son and I were done.
The Challenger kept shorting out the layout when going through the 036 Fastrack switches. Or more specifically, it's tender kept shorting out. A few of these on the switches left some arcing marks that showed me where the problem was. I've attached my quick fix solution that just involved masking tape. The arcing marks were on the very tip of the center section where you can see my first piece of tape. Some less frequent shorts a little further down resulting in a small addition and things seem to have been fine after that.