Not really new
Any 3d printer can catch fire, which is why they shouldn't be left unattended.
Remember, 3D printers run at high temperatures, I'm usually running the extruder anywhere between 180C & 200C
All you need is either a head crash or the filament to fail to extrude so it builds up as a blob around the nozzle & it will overheat. I've seen pics of print heads encased in a plastic cocoon which effectively needed them replacing, but if left longer could have been more serious.
Whenever I use my printer I'm always around & can literally pull the plug if things get serious.