Whats your mobo model? I have ROG Strix Z690-A D4 and EZ Flash worked fine for me to roll back to 2204. 

Yes via BIOS flash interface. Maybe try contact ASUS support, maybe they could help you. What motherboard model do you have?

Yes, I downgraded to 2204 as I did not liked 2305. Z690-A D4

I rolled back to 2204. 2305 makes bsods with same settings in Geekbench 5. Also I foun very small decrease in performance. And a fact that E-cores per core ratio not working as expected - cannot change Auto values on e-cores 2, 3, 4 . I tested couple...

I found a bug in 2305. On my 12700k I cant set e-core multiplier, only for first core. Other 3 stay Auto even if I set them for specific value.