Bought this in June 2019 and used it throughout the year up until October. Just tried to fire it up for the first time this year and it won't stay lit unless the control knob is held in. No problem getting it to ignite but it won't stay on. Plenty of gas in the cylinder as it will stay on and the burner can be set to max but only while the knob is pushed in.
I've contacted the email address in the manual, hopefully they can come up with a solution as I really don't want to return it. Everyone that's seen it has been impressed.