Other Parts Discussed in Thread: TPS7A4001,
we already talked about that problem here:
but we have some devices with older layout/schematic where we use exactly the same 3.3V LDO as you do. the TPS7A4001.
And with this layout the TPS23861 will also broke some times.
VPWR is in this case delivered by a meanwell EPS-45S-48 and the step-up U1 is not used.