Why does my loading bar freeze at 90% in League of Legends?

While loading into Summoner's Rift, I noticed a weird asynchronous phenomenon in the quad-channel memory scheduling of my Jinyue X99M-PLUS D4, causing the progress bar to stall at 90% for ten seconds, which was incredibly draining. I first tried increasing the virtual memory to 32GB in system settings, but the loading speed didn't improve and instead caused slight disk read/write conflicts. I used the GamePP Resource Scheduler to force the game process priority to Realtime and disabled irrelevant background services. Memory temperature stayed at 42-48℃ per AIDA64, motherboard VRM at 55-61℃ per HWInfo, and memory bandwidth utilization increased by 15% per GamePP analysis.