0368   715C A6 FC       GO     LDX SP
0369   715E 9A                 TXS               ; ORIG OR NEW SP VALUE TO SP
0370   715F A5 F7              LDA PCH
0371   7161 48                 PHA
0372   7162 A5 F6              LDA PCL
0373   7164 48                 PHA
0374   7165 A5 F8              LDA FLGS
0375   7167 48                 PHA
0376   7168 A5 F9              LDA ACC
0377   716A A6 FA              LDX XR
0378   716C A4 FB              LDY YR
0379   716E 40                 RTI

What is happening here?
The registers are loaded from the zeropage save locations, where they were stored by the interrupt (BRK/IRQ).
In the right order for RTI to jump to the Program counter on the stack.