Windows 10: Intel Dynamic Tuning overheat SEN1_HOT - DELL G5 15 5590

I have recently encountered a problem I never encountered before. Essentially, my computer started to overheat and shutdown under load due to Intel Dynamic Tuning: SEN1_HOT = 368 K event. I am confident that it is neither CPU Official Intel Extreme Tuning Utility showed me around 80 degrees under load, nor GPU MSI afterburner gave me around 70 degrees.I have no idea what SEN1_HOT code means, first part specifically. I think that SEN1 means "Sensor 1", but I still have no clue where it is located. I have found similar reports while googling and encountered NVME_HOT, WRLS_HOT and TCPU_HOT, w

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Dell G5 5587 Intel Core i7 8750H throttling

I have a problem with my laptop Dell G5 5587 and its CPU Intel Core i7 8750H.
I have bought this laptop in December last year and since then I've encountered a power throttling on CPU (more specifically, PL1 limit), despite this being a 'Gaming laptop'.

The symptom is as follows: when gaming, or doing any other CPU+GPU intensive task, the laptop decides to lower Power Limit to 15W from standard 45W and the CPU throttles to 0.8 GHz from 4.0GHz on Turbo.

The configuration is the following:

• Dell G5 5587 chassis
  
• Intel Core i7 8750H 6x2.2GHz (up to 4.2 GHz)
  
• 16 GB DDR4-2666 RAM
  
• NVIDIA GeForce GTX1060 Max-Q Design with 6 GB VRAM
  
• Toshiba 512GB M2 SSD
  
• Samsung 860 EVO 1TB SSD
  
• 15.6" 4K HDR screen
  
• Windows 10 x64 Enterprise Insider Preview Version 20H1 Build 18865 + Ubuntu 18.04 LTS
  

I have tried everything, including what I've found on the Internet:

• Update BIOS (several times, it came with v.1.5.1, I'm now on v.1.9.0)
  
• Update drivers (all of them)
  
• Update Windows (obviously) and all the software I have
  
• Followed several guides for this particular CPU, including undervolting the CPU and cache, as well as reducing Turbo boost speeds
  
• Removed Intel DPTF following this guide Removing Intel DPTF for good
  
• Disabled Turbo Boost
  
• Contacted Dell Support, which turned out to be pointless, as I had to spend around a week to explain to them the problem, and that I'm not stupid and I have all the updates. I provided them with log files to show the behavior of the system
  
• Installed Dell Power Manager and set cooling to Ultra-Performance
  

As you can see, I've reached an impasse and I was wondering maybe the respected community of Stack Exchange could help me out
I haven't done extensive testing under Linux, though, but I don't remember anything like this happening there. So this seems to be particularly Windows problem.

Only other choice I have left is to wait for 9th Gen Intel CPUs to come out and exchange the laptop under warranty.

EDIT
I'm using Windows 10 x64 Enterprise Insider Preview Version 20H1 Build 18865 (obviously updated more than dozen of times already)

UPDATE 1:
As recommended in comments, I have enabled the Ultimate Performance battery mode, but it didn't help either.
I have also followed this Guide to prevent PL1 limit from changing. But it didn't help either.