Possible race condition in PSO precache collection tasks

Hello

During the playtests, we have encountered random crashes related to PSO cache collection. Those crashes occur on PCs with wide variety of hardware, however low spec ones have higher chances of reproduction.

I tried manually reproducing this crash on few low-spec PCs similar to the ones with high occurrence but it was unsuccessful.

Due to the nature of these playtests I was unable to gather any additional information, certain steps or conditions leading to the reproduction. The only thing that is certain - it randomly happens during level streaming. I have assumption that the Material or it’s ShaderMap becoming invalid right during the PSO collection task.

Would appreciate if someone has any additional information regarding this or similar issues, possible reproduction or fix suggestions.