Unfortunately, this does not tell you exactly what kind of device you have. We didn't really know anything specific, not even the size of the memory or the SoC model.
Do you mean you have tried the KI-Pro (S905D), KI-Plus (S905) and MXQ Pro 4K 2G (S905X) images? That doesn't make much sense.
It should be tested with another DTB based on SoC and memory size, from here: http://libreelec.dtech.hu/device_trees/
Random updates with ".nocompat" are dangerous, if possible, test on a new SD card first and only update if it is stable on your device.
If you are not using the right DTB, don't be surprised if the system is unstable on your box.
I'm not sure how I never found the device tree link you have supplied in my previous searches. As far as the model is concerned I did try to find my original purchase info but no joy. That was my reason for referring to my box as MXQPRO (not 4k). Here is a photo of the pcb.
The SK Hynix H5TQ4G63AFR identifies as 4Gb DDR3 SDRAM
The Foresee NCEFAT28-08G identifies as 8Gb eMMC, although apparently it's an eMMC controller with NAND Flash.
I'm sure if I use images from the supplied device tree I will have a stable LibreELEC system, however I am now running a CoreElec 9.2.8 (gxb_p200_1g) which is working error free with full functionality.
Stuart