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LT8471 for multiple voltages supply

Dear All,

I need to make a multiple voltages supply from a single 24V input to +/-12V, +/-5V, 3V3 output like below.

 

When no load connected, all output voltages are as expected. When loads applied, LT8471s are burned. I did copy +/-12V and +/-5V configuration from LT8471 datasheet.

In addition to, from Googling, I see the negative voltage is equal to add voltage offset to the GND reference point. So, in able to have those output voltages, I have to isolate the regulators?

Please advise me.