[2021] Game Crashes Hard locks. landing in summoners rift DX11

SummaryWhen Starting a game of summoners rift, the game running on DX11 seems to Crash without error just freezes. needs to be closed with task manager. but once closed and relaunched The Client seems to be running perfectly fine aftewards.

Repro Rate 3/5 times 60%.

Steps to reproduce

1. launch LoL
2. Enter PVP (summoners rift)
3. Observe.

Actual ResultsGames Become Unresponsive. unable to close without Task manager

Expected results.Games Successfully start.

PC SpecsRTX 2080ti 32 GB Memory (4x8)Intel 6900k
G-sync is also enabled

NotesDoes Not Occur On DX9 PBE or LiveAlso Occurs on Live DX11