Info online states that this model shipped with 16GB RAM and you have 32GB.
Did you upgrade to 32GB or did DELL add the extra RAM for you?
If you have mismatched RAM sticks they can act up under certain heavy demand applications. I'd run MEMTEST86 on this system and let it run through 3 full tests. This might take a few hours. But if there is a memory issue it would flag it in red and tell you of the issue with RAM.
https://www.memtest86.com/If it is caused my mismatched RAM, the solution is usually to replace one of the memory sticks with the exact same RAM manufacturer and specs. This might mean pulling out the original 16GB you started with and adding a new 16GB stick that is the same as the one that was added to upgrade from 16GB to 32GB.
If the RAM is a matched pair from Dell for 32GB and reports issues with memtest86 then it will require removing all but 1 RAM stick to try to determine which stick has an issue or which one doesnt play well with other memory sticks.
Other scenario for a quick blackout of a shutdown for laptop would be if the cooling fan stopped spinning in which the system would be killed of power to protect it from a CPU or GPU meltdown.