Maybe unrelated but I think it is a Hyper-v (w10) issue, not a WSL one. At least...

lunfard00 on April 21, 2021 | parent | context | favorite | on: Initial preview of GUI app support for the Windows...

Maybe unrelated but I think it is a Hyper-v (w10) issue, not a WSL one. At least same thing happened to me some days ago on one VM running on Hyper-v, it went crazy and consume all my 32gb of ram. It seems to be fixed after reducing the number of cores available to it.