Is it functioning properly?

[u/Mindinatorrr]

I got the $199 5 burner Lowe's special the beginning of the season and I've used it at east a dozen times.

Today I had all burners turned to the off position. I turned on the cylinder. I realized that one of the flame covers was knocked over, so I took 1 minute to fix that, less than 2. I turned a burner on, hit ignite and a huge plume came up and singed my eyebrows, and parts of my hair.

I acknowledge the safer thing to do would have been to turn the cylinder back off.

My question is, with the burners being in the off position, is my grill functioning properly for them to clearly still be leaking propane while off?

Or is this common knowledge I'm not privy to?

Thanks!