Intel NUC NUC7PJYH - suspend? yes, wake NO :-(

I recently acquired the referenced Intel mini PC. I added 8 GB of RAM and a 128 GB SSD and installed Ubuntu Mate 18.04. Works great except that if I suspend the computer it seems to be suspended - power light flashes on/off slowly. However, it will not wake up. Normally I can do this by tapping a key or the power button. I have also tried Ubuntu Mate 20.04 and CentOS 8. Same issue so it appears to be a hardware issue. Searching found some older info about other NUC models with instructions about making changes in BIOS. I do not find the referenced BIOS settings on this NUC but I have tweaked similar settings. No luck.

Does anyone have any (successful) experience enabling suspend on a recent, low end NUC?

TIA,

Ken