In this particular case, a time event is defined to execute 'Repeatedly', in intervals of minutes (number is not relevant), and 'Immediately'.
In the Runtime section, an MRT is defined with a 'Fixed Value' of a few seconds and the 'Actions and Runtime Deviations' Cancel the task and then Execute itself.
In the 'Process' Section, the following script is defined :
:set &LARRAY# = 'TEST_HOST_ARRAY'
:set &LVAR# = 'LOCAL TEST'
:pset &GVAR# = 'GLOBAL TEST'
:print 'GVAR = &GVAR#'
:print 'LVAR = &LVAR#'
When the event is executed, on the first iteration you get the following:
2017-09-29 12:15:18 - U00020408 GVAR = GLOBAL TEST
2017-09-29 12:15:18 - U00020408 LVAR = LOCAL TEST
On each following iteration the following:
2017-09-29 12:15:50 - U00020408 GVAR = &GVAR#
2017-09-29 12:15:50 - U00020408 LVAR = LOCAL TEST
If the 'PUBLISH' statement is commented out, the problem does not occur!