your shim only can deliver 2.5 amps a basic pi4 with a screen draws 3 amps so you will be short of 0.5 amps resulting in strange behaviour and you don’t know why… it’s because the shim can only power the pi
and has not enough power to power the screen / dac next to it.
en Ewoud …
Ge, Wheaten, Michel and I are all dutch and we already went true many rabbit holes in the past.