Cold proofing works great if your fridge is actually cold enough (mine sits around 38F and even that felt too warm for a 70% loaf). The real issue is the dough keeps fermenting slowly in there, so by the time you bake it the yeast is spent and has nothing left for the oven. Next time try pulling it out and letting it sit on the counter for an hour before baking, and watch how much faster it springs. Your Tulsa bakery lady was onto something with the counter proof at 78F, that temp is right in the sweet spot.

Corroded connectors are the worst because they hide so well. Had one behind a cab mount on an old boom truck that looked fine from the outside but was green inside. What got me was the vibration, since every time the boom swung it jiggled that bad pin just enough to cut the signal. After chasing it for weeks I ended up running new sealed connectors and putting dielectric grease on every pin I could reach. The wireless kit itself was fine, the wiring was the real problem the whole time. So before you drop cash on a new kit, test your harness with a meter while someone moves the boom, because that will tell you if it is the connector or the radio.