Inconsistent data types (Text vs Variant) in List of Map output

I am working with a rule in Appian where I expect a consistent structure of List of Map, but I am seeing inconsistent data types in the output.

a!localVariables(
local!indexval: index(
ri!userFilters,
"userFilter",
null
),
local!filters: split(local!indexval, ";"),
a!forEach(
items: local!filters,
expression: a!localVariables(
local!valueStart: find("value=[", fv!item),
local!valueBlock: if(
isnull(local!valueStart),
"",
mid(
fv!item,
local!valueStart + 7,
len(fv!item)
)
),
local!cleanValueBlock: substitute(local!valueBlock, "]", ""),
/*Values */
local!AccountName: if(
find("name=AccountName", fv!item) > 0,
a!forEach(
items: split(local!cleanValueBlock, ","),
expression: trim(substitute(fv!item, """", ""))
),
{}
),
local!ProductCategory: if(
find("name=Product Category", fv!item) > 0,
a!forEach(
items: split(local!cleanValueBlock, ","),
expression: trim(substitute(fv!item, """", ""))
),
{}
),
a!map(
AccountName: local!AccountName,
ProductCategory: local!ProductCategory
)
)
)
)



expecting ProductCategory and Account name in single map