TB45 loses throttle response on kick down start

[Huseyn]

Hey guys,
So I own Nissan Patrol 1998 TB45E (gulf-spec), 300.000KMs on the clock. Yesterday here was heat outside (around 32°C), coolant temprature went up to 94.5°C. Then I started to lose throttle response, when I press the gas pedal engine wanted to stall for around 2 second then gains RPM. It was undrivable in traffic jam so I towed it to the service. When arrived, engine and outside temp already was cold (15°C) and engine/throttle response was okay, no problems so far. We checked leads and spark plugs anyway, all was in good condition.
On the way back home it suddenly started to unstable idle and while pressing gas pedal fully to roll, it feels like engine in drowining for 1-2 seconds, rpm drops and gains again(attached video below). This contidition is not happens all the time so it is hard to pinpoint the problem.

Happens in these conditions(not always):
1. Kick down start
2. On rolling speed while RPM is below 2000RPM gas pedal fully depressed.

**after 2000RPM no problem at all, even tried on sand dunes, RPM went up to 4500-4600RPM, no power loss at all.

I don't know if it has any connection with the temprature of outside temprature, I would like to where to start to check.

Thanks for the help guys!