Try this first.
Param: 394.6 WKZRST
1 : Work coordinate is changed to G54 by reset operation.
0 : Work coordinate is not changed by reset operation.
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Not sure, but may be conditional on how you have the following and related parameters set.
Param: 45.6 CLER
1 : Selects clear conditions, using the reset button,external reset signal and emergency stop.
0 : Selects reset conditions, using the reset button, external signal and emergency stop.