I have attached the schematic that we are using , this used in 1+1 redundant PSU application, with 50V_VOUT being the 50V CFEED BUS powered by two such PSUs. During Hotswap application , when one psu was removed, causing the load to go from 20A to 40A , this is causing the load switch mosfet to turn off momentarily, and then startup. To resolve the issue we changed R330 from 100K to 1Meg causing the voltage at the shutdown pin to go down to 5V and changing R8 from 2K to 10ohm , reducing the filter on the OUT pin . This allowed us to do hotswapping at full load. But we see issue hotswapping at very low load like when switching from 0.1A load to 5A load and causing the mosfets to turn off. It will be good if you can propose a solution.
Also during pugging in we have noticed the it dips the bus voltage sightly by conducting current in reverse direction , likely caused by dv/dt induced turn on of the mosfet Q4. 