Memory leak issue perhaps?

Update & possible solution: I uninstalled from Steam and installed and launched on EA App instead and there is no longer a memory leak. There may be an issue with the Steam version of the beta. So if you're having issues with your game crashing due to high RAM usage/suspected memory leak and you're launching from Steam, try installing and launching from the EA App; it worked for me.

I am now sitting around 3GB RAM usage rather than 20GB and after 15 min of sitting in the lobby screen, it is not increasing. Try the above and check your resource monitor just to be sure the issue didn't persist.

Edit & new solution (thanks to SAAC_Brill): The launcher is likely not the root cause, read the replies in this thread and check if disabling anti-aliasing, upscaling, and/or frame-gen fixes the RAM usage. If not, try the original solution of uninstalling and switching launchers.