Continuing quest to solve stalling issue

[Mike1261]

I have a weird issue that I've been tracking down to no avail.

It only seems to happen after long multi-hour drives after which we stop and eat in a parking lot.

Upon resuming our drive the car starts stumbling on acceleration, and often stalls out when not enough throttle is given.

Then it's mostly ok after turning off and restarting the car again.

The first time this happened and totally killed the car, #6 spark plugs was totally fouled. Replacing it fixed the issue.

Historically it seemed that changing the spark plugs would avoid the problem returning. Except now I've changed the spark plugs only 2,000 miles ago and they all look fine. No obvious fouling or issues.

The only error code is that the front O2 sensor is out of range. I've changed the sensor 3 times (always brand new Bosch) to no avail.

A compression test does show that #6 is a little low but I wouldn't expect it to be severe enough to cause this issue, especially since it seems to mostly resolve with a restarting of the car.

I've done all the following, and the issue seemed to have gone away and recently returned again. I live in Florida and it's been 90+ degrees lately so maybe climate is a factor?

Replaced Fuel Pump
Replaced Fuel Filter / FPR
Replaced Fuel Injectors
Cleaned MAF with MAF Cleaner
Replaced Intake Side Cam Sensor
Tested all Coils. They all read identically, and 1 is new (probably didn't need to be replaced but I was throwing parts at the car).
Replaced Pre Cat O2 Sensors
Cooling System is running fine. New water pump. New thermostat. New expansion tank. New electric fan. No issues.

My wife doesn't trust the car enough to drive it herself so I'm really trying to figure this out.