Replaced the 3.3v regulators earlier this year in all of the v3 and v4 LEs that we had, but still had temp issues in about 6/12 of them.
2x c7 or c9s in the box placed near the regulators should keep it warm enough to run into the teens.
If you want to test out the temp theory, when you see odd behavior on an LE, warm up the regulators with a heat gun and see if it gets better.