HI CodeJingle,
thank you for your reply.
I don´t know if other reports really are helpful, because:
1) I don´t have anything attached to the Mac Pro other than a monitor, an ethernet cable and power
2) With the original Apple 1TB SSD the system shuts down without any problems
3) Only with the Crucial drives it doesn´t, and that means, it doesn´t with the 4TB P3 variant (Monterey freshly installed and then ´Time Machine(d)´with the external Time Machine SSD from my 2020 Mac Pro
4) But with the 1TB Crucial P3 the system also doesn´t shut down and this one is also completely new (purchased last week as was the 4TB) and the only thing I did with it was to freshly install Monterey. Unfortunately there is no new firmware on the Crucial website
Oh, and by the way, I forgot the benchmarks:
Original Apple 1TB-SSD: W: 926, R:884
Crucial P3 4TB: W: 1320, R: 1455
And I forgot to mention that I witnessed another strange situation today. I changed the adapter to a new one (the brand is called Anyoyo), and after installing it the Mac shut down correctly once. And that was that. Only once. After that I didn´t move the Mac so I don´t think that the adapter got out of place. Everything worked fine after that, only that the system wasn´t shutting down again - as ´usual´.
Shall I have a look to the other reports anyway, although the shutdown problem only occurs with both Crucial ´drives´?
Oh, and what did you mean by the drives not being updated properly?