This is the first time i've experienced this and i wondered if it is normal. I live near a very mountainous area. My wife, son, and myself traveled up the mountain to a nice restaurant for dinner. On the way back down, it is a relatively steep grade. I had 201 miles out of 259 on my 75D. After a few minutes coming down the mountain, I was at 206 and suddenly I saw the yellow dotted line for limited regen. I was nowhere near a full battery, so is this heat related or is there an actual issue? Ambient temperature was 80 degrees Fahrenheit.