S20BLK constant power loss / power regained notifications

[Anonymous user]

Windows 10 x64 LTSC

PCPE_3.1.0

Every couple of minutes powerchute is generating windows notifications that A/C power has been lost and then regained a minute later.

It is constant and pervasive unless I disable the notification in windows settings and/or audible notification in powerchute.

This issue survived through an OS reinstall which makes me believe its hardware/firmware related to the S20BLK unit.

Before powerchute was installed again my pc was constantly entering sleep mode and waking back up, which leads to the unit itself.

I can log into the web interface and performed some resets but it didn't help.

I made sure I was plugged into a usb 2.0 port instead of usb 3.0 port but it didn't help.

The strange thing is, every time the notification sounds, I do not hear the s20blk audibly change over to battery mode.

Under normal operation, if the mains are lost, the unit switching to battery power is audible and fairly obvious.

I am seeing the notification every few minutes, but not hearing the unit kick over, and I have no reason to believe the A/C main power source has become this unstable.

The powerchute software passes self test, and otherwise seems to be reporting properly.

Thanks for any info, leads, or recommendations for testing.