mysqli_fetch_array exceeds memory

I a running a relatively simple query:

SELECT gb2_designs.indx,
              gb2_designs.response_required,
                            gb2_designs.user_design_name,
                            gb2_designs.submitted,
                            DATE_FORMAT(gb2_designs.submitted_timestamp,'%c/%d/%y') AS stime,
                            DATE_FORMAT(gb2_designs.promised_ship,'%c/%d/%y') AS ps,
                            DATE_FORMAT(gb2_designs.updated,'%c/%d/%y') AS upd,
                            DATE_FORMAT(gb2_designs.promised_ship,'%c/%d/%y') AS dp,
                            DATE_FORMAT(gb2_designs.shipped,'%c/%d/%y') AS ds,
                            order_accepted, order_completed,
                            gb2_designs.status,
                            gb2_users.first_name,
                            gb2_users.last_name,
                            gb2_users.email
                     FROM gb2_designs, gb2_users
                     WHERE  1 && gb2_designs.user_indx=gb2_users.indx  && 
                            response_required=1
                     ORDER BY gb2_designs.updated DESC";

And then iterate over the rows with:

while($row=mysqli_fetch_array($query,MYSQLI_ASSOC))
    {
      $indx              = $row["indx"];
      $user_design_name  = $row["user_design_name"];
      ...more stuff''
    }

There are 104,422 rows in gb2_users and 70,385 in gb2_designs. When run manually, or in a .php file on apache that does only this, 5 elements are returned which appears to be correct. I am running Mysql version 5.7.40 When I am running it in a larger script, it returns the 5 rows matching the criteria successfully, then when it does the 6th (which should return null for $row), the code properly returns numm for $row, but issues the following to stdout: Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 4096 bytes) in /home/omittedforprivacy/public_html/svadmin/lookup.php on line 1376. Line 1376 is the mysqli_fetch_arra($query,MYSQLI_ASSOC). It appears to be getting everything but issuing that pesky memory error. Apache is running without a memory limit set. Any ideas?