Game seemingly got a memory leak?

[Kottonmouthking]

So as title says, my game seems to have gotten a memory leak or something. Like I can be playing with the ram around like 4-5gb then I notice the game get laggy at some random point(frames drop) and check my overlay(msi afterburner) and suddenly the game is using around 8,100mb of ram and game crashes.
Could dlc cause it? Because recently bought the season pass because it was on sale and been waiting for it and installed the vault dlc and the contraptions dlc, was able to play for hours before without anything happening other than the common random broken textures after some random amount of time.

No mods. Only dlc currently installed: vault tec workshop, contraptions workshop

Pc info -
OS: Windows 7 pro
Cpu: i5 6600k, stock clock
Gpu: Radeon rx 470 4gb
Ram: Ballistix 8gb 2400 ddr4, single stick