That said, I'm troubled by the heat of my R5 for still shooting. On a warm day in a mostly shady back yard, I shot 192 still images in 16 minutes, following a 55 minute break after shooting a couple dozen images. That's 12 shots per minute.
It gets hot at the grip area. Uncomfortable enough that rotating to vertical to hold the battery grip is a relief. Enough to make one understand the concept of low-temperature burns. I shot some images with my phone using my Leupold LTO, which does not show absolute temps.
It shows the hot areas rear, with card extended, side, top and front.
The first impression is that the card is the "smoking gun" but it wasn't alarmingly hot more than the rest, and I suspect it just reflects interior temp, not the heat source.