It’s hard to tell because we don’t have whole panel. Something is triggering your script(and this is something what this script is changing)
Maybe try to mute modulator
param:setModulatorValue((_G[ “tbl_keyassgn”..keyselct ])[ i ],false,false,false)
change to
param:setValue((_G[ “tbl_keyassgn”..keyselct ])[ i ],true, true)
