I wonder why it doesn't work in Raspberry Pi 4 with 8 GB. What
(you think) does it make the difference with the 4 GB?
I was under the impression that the hardware of the 8GB Raspberry Pi 4 was identical to the versions with less memory except for (obviously) the memory chip and some fixes for USB-C power delivery. Maybe it's a subtle timing problem - another item on my to-do list...