hello andrew,
For me lags started since the 2021.12...i tryed all others release without succes...same issue...i just seen that the release since 2021.12 use more the CPU than 2021.11 and less GPU...i posted two picts of 2021.11 and 2021.27.. ..just opened with the same options..and you can see the differences..i installed the last nvidia drivers..