M.2 Extension board not working with Rock 3A

#1

Faced such a problem.
I bought this SSD Kingston SKC2500M8/250G.
Here is the link to the datasheet
https://www.kingston.com/datasheets/kc2500_prelim_us.pdf
Connected an SSD to my Rock 3A via this M.2 Extension board
https://shop.allnetchina.cn/collections/rock-pi-4-accessories/products/rock-pi-4x-m-2-extension-board-v1-6
For testing, I used the official versions of Ubuntu and Debian with the 4.19 kernel.
After a successful start of the system, I wanted to test the performance of the SSD.
But I found that the SSD is missing from the system like any device.
I ran the lsblk command and all I saw was the SD card that started Linux and nothing else.
Moreover, after about 1 hour of continuous operation, the SSD warmed up noticeably.

Last clarification
When I connected my SSD directly to the M.2 connector,
it was determined without any problems and I was able to format it.

Is M.2 board incompatible with Rock 3A?
Or I got a faulty sample.
Has anyone encountered a similar situation?
Thanks in advance for any help.

#2

I found the following. If you tighten the bolt that presses the SSD to the M.2 expansion board to the very end, so that the SSD is completely fixed. In this case, the electrical contact in the M.2 connector is broken and therefore the SSD does not work. I loosened the locking bolt a little. This restored the SSD operation. I’ll have to put some kind of washer under the SSD to prevent it from taking root until the very end.