bone stock internals b16 engine with garrett t3/t4 turbo boosting 6psi. i'm using uberdata for engine management.

this is what i'm noticing...when i first started the engine while it's cold, the drive will be fine and normal. but if i shut off the engine, say while buying something and then i restarted the engine and drive at low rpm, the engine would bog down hard when i lift off the gas pedal at around 2k rpm even without stepping on the clutch and it will jerk forward once i step(lightly) on the gas pedal again.

it is very irritating already even if i had a/c switched ON but the problem will fade away after few minutes of driving. it doesn't do this when the engine was first started from cold. any idea what's causing this?