DirectQuery Not Updating with Parameter Change

Yes, I have that each parameter is only bound to one column. I am using the same column/parameter value in mulitple queries. Here is sample of my M queries, the only difference in the queries is the bolded parts: 

Query 1:
let

str = if Text.Length(test_param) > 0
then " WHERE table1.col1= '" &test_param& "'"
else "",

Source = Value.NativeQuery(PostgreSQL.Database("localhost", "database"),
"SELECT table2.col2#(lf)
FROM table2#(lf)
INNER JOIN table3 ON table2.col3= table3.col3#(lf)
INNER JOIN table1 ON table1.col1= rates.col1#(lf)
"&str&" #(lf)
GROUP BY table2.col2, null, [EnableFolding=true])

in
Source

Query 2:
let

str = if Text.Length(test_param) > 0
then " WHERE table1.col1= '" &test_param& "'"
else "",

Source = Value.NativeQuery(PostgreSQL.Database("localhost", "database"),
"SELECT table1.col4#(lf)
FROM table2#(lf)
INNER JOIN table3 ON table2.col3= table3.col3#(lf)
INNER JOIN table1 ON table1.col1= rates.col1#(lf)
"&str&" #(lf)
GROUP BY table1.col4, null, [EnableFolding=true])

in
Source

When I change the value of test_param, only the table connected to Query 1 updates, the table for Query 2 does not.