QLIK SENSE ONLY Please.

Bear with me, I swear this is a bookmark question.  I'm not trying to be confusing - I had a process that worked UNTIL the bookmark was applied.  Then my set analysis stopped working because the bookmark changed my result variable.

1.  Set Analysis for YTD:  I have a set analysis that goes like this:

Sum({<
MONTHLY_DATE={">=$(vCurrentDateSelectionFYStart) <=$(vMaxCurrentDateSelection)"},
MAIN_FLAG={'1'},
ACCOUNT_TYPE={'P & L'},
LEVEL_4={'TOTAL OPERATING EXPENSES'},
MONTHLY_TRANSACTION_TYPE_GROUP-={'B','F'}
>}MONTHLY_AMOUNT)

2.  Variable used in Set Analysis:  The variable vCurrentDateSelectionFYStart is based on a field called MONTH_YEAR it's written like this:

LET vCurrentDateSelectionFYStart = '= if(GetSelectedCount([MONTH_YEAR])=1,NUM(MAKEDATE(IF(MONTH(Date#(GetFieldSelections([MONTH_YEAR]),''MMM-YYYY'')) >= 7, YEAR(Date#(GetFieldSelections([MONTH_YEAR]),''MMM-YYYY'')),
YEAR(Date#(GetFieldSelections([MONTH_YEAR]),''MMM-YYYY'')) - 1), 07, 01)))';

And it works fine.  I highlighted the field above that's changing after the bookmark is applied.

3.  Bookmark Applied:  Then the user wanted to default the MONTH_YEAR to start as the last finished month (so for Jan 26,2022) it would be Dec-2021.  Pretty straight forward:  I applied a bookmark to the MONTH_YEAR field 

{<MONTH_YEAR={"=MONTH_YEAR=MONTH($(var_1MonthAgo))&'-'&YEAR(var_1MonthAgo)"}>}

4.  BookMark causing issue with the set analysis variable:  Now the set analysis will not work because the MONTH_YEAR, piece of my variable is coming through as

=MONTH_YEAR=MONTH($(var_1MonthAgo))&'-'&YEAR(var_1MonthAgo) appears everywhere above where the MONTH_YEAR was bolded.

Can I do the default bookmark in a way that doesn't impact the set analysis (variable)?

Thanks guys, I'm stumped right now!

#Qlik Sense