While sleep seems to be working fine, we've got some NVMe related crashes with a 512GB XPG Spectrix S40G that stopped after replacing it with a 970 EVO Plus. Btw, the XPG Spectrix S40G worked fine for months with a 2012 Mac Pro and BigSur.
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Even if we never had the NVMe crash with XPG Spectrix S40G when the previous 429.60.3.0.0 and 12.4 was installed, it's difficult to affirm that the new firmware release is the culprit here, could be something with the kernel of the 12.5 betas that was incompatible with the previous installed blade, since it's working for around two weeks with the 970 EVO Plus without KPs.