AP7852 Reading 79A

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I have updated an AP7852 from firmware AOS 2.6.4, RPDU 2.6.5. Since doing this, the current display is showing 79A, or 78.5 in the web console (I have reset a number of times). Have not pulled power plug due to it being in use.

I updated firmware to 3.9.0, then found a download for 3.9.2, and both are showing the same issue. I haven't gone back to 2.6.4 to see if this resolves the issue. During power up, the display changes to 88, which I gather is a display test, then changes to 79A

Anyone got any idea why it is doing this, is this expected, should I have done something, should I just downgrade?

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