Hmmm, If the saw re-fires right after you clear it (less than 5-10 min from the time it dies) then I'm not inclined to think ignition is the sorce of the problem. But a quick check for spark
immediately after it dies is quick and cheap to do.
After the carb re-build, are you saying the saw no longer stalls out while cutting but now floods when you try to restart it?
Leaking crank seals will tend to lean out the mixture but if someone adjusts the carb to try and compensate (adjustment will be
very finicky) there may be times the saw runs excessively rich.
Those rings look awfully shiny, could be camera flash but they could be worn as well. Steeltown, you've mentioned this saw acting up before and I suggested a compression check. I highly recommend you do a compression test on this saw now with these symptoms.
Steeltown's rprevious thread -
https://www.hearth.com/talk/threads/stihl-460-acting-weird.87935/#post-1139443
Double Hmmm...... Finicky carb adjustments, shiny rings, stalls when hot, piston shows signs of heat (brown could be oxidized oil) , yeah this thing needs a compression check at the very least if not a complete crankcase pressure test. (which would also tell you if your crank seals were leaking....
)
If the cylinder bore size and piston checks out, you may be in for just a simple re-ring and you're back up and running.