Help me reach a truce with my pressure cooker.

So here’s where I’m at: this afternoon made the ATK meatballs and marinara recipe. Not sure meatballs need to be a PC item, but it’s what I wanted to make. So, the sauce is simmering, the meatballs are added, the lid is locked. At about 5 mins I get a fair bit of steam venting around the handle and pressure dial, but no pop up. I remain patient and stay at med-low heat (despite recipe calling for med-high). At 10 mins, still lots of steam, no pressure indicated. I squeeze and jiggle the handle and the thing immediately pops up. I shift to a simmer burner and lose pressure- my bad. Can’t get pressure back up. There’s water from condensation in the well that the pop up button sits in- I poke at it with a knife tip and it immediately pops up. The meatballs came out great- 5 mins under pressure does indeed cook them through. Now, tell me oh wise pressure cooker sages- is this normal to have to fiddle with the pop up button or is this coincidence and it would have popped eventually or is this a faulty item? At least no burning…

(Because I’m committed to this and am a kitchen nerd, I doubled the meatball batch and the other half is in the oven on a rack (my usual method), browning to be added to sauce later for comparison. I’m thinking blind taste test as the other eater’s won’t know the rack ones always are a little flattened on the bottom…)