This CPU has on package LPDDR5 so I guess this is just the number of channels the memory controller has.
@Myaghi There is a longer thread on this forum discussing Lunar Lake (Core Ultra 2xxV CPUs) on Linux; maybe there are some hints there: Suspend w/ Linux on Lunar Lake (2024 MSI Prestige 13 AI+ Evo A2VM)
But this looks like an issue of compatibility of the kernel with the Lunar Lake platform. Probably you upgraded a kernel version in november that had some regression?