Has anyone experienced excessive blue smoke at idle upon startup when the truck is cold?

Sometimes the engine will knock and miss if running on 3 cylinders and eventually clear up.

This happens randomly like it will do it one morning but not the next.

Sometimes it will go into high idle, and the engine will sound smooth but will have a blue haze from the exhaust.

It's weird; it won't do it if it's -20°C, usually around 0° to 10°C.

I have a 2015 RAM 3500 6.7L Cummins fully deleted with RaceME Ultra basic tunes.

The truck has 168,000km but has been an ongoing issue for a while now.