this is a 'known' feature of some electrical items... including modules... it's called 'inrush'
if it's only when plugged into certain places, I'd move it - possibly some busboards have limits...
-- JimHowell1970
Yes, it's likely I had too many high power usage modules with significant inrush on the same busboard. I should have mentioned I have fixed this by plugging the problem module into a different busboard on the same power supply.
It's frustrating to discover a problem like this after installing all your modules, and maybe you are using all the plugs on a busboard so swapping things around isn't a simple matter. I have found it invaluable, especially after moving to a big case, to have a few multi-power cables / flying bus cables around to give me some extra plugs or even act as an extension cable to a far-away busboard. 4ms has always served me well for this: https://4mscompany.com/power.php
I bet it is more common to run into problems like this in a big case because you're installing more modules. More modules = more likely to encounter a problematic combination. It totally depends on your module collection, but if you have power hungry modules, you might end up with a layout with too many of them on the same busboard. So be aware of this potential problem, and my tip is to get some of those power cables and try swapping around which modules (the ones having problems) are plugged into which busboard.
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