also the blob is a clear indication that the bowden tube needs pushing down further, you should never have any gaps. That will cause a clog.

And yeah, smoke at 225 is definitely not anything that can happen at 225.
You've got to go a lot higher to get smoke from pla, I mean a LOT higher.

but a short circuit or sparking wire or conection would cause smoke.
That's most likely your culprint. Either a dodgy thermistor or heater cartridge wire or connection.