Oracle Update Query Not Responding

We have an Oracle based legacy Operations Software that we are interfacing with to set some custom local information.

I have this method

public function update_pricing($pn)
    {
        try
           {
               $pn = preg_replace('/[^\w\d]/', '', $pn);

               $part = DB::connection('oracle')->select('SELECT PNM.PNM_AUTO_KEY, PRN.CATEGORY_CODE FROM PARTS_MASTER PNM LEFT OUTER JOIN PART_RANKING_NUMBERS PRN ON PRN.PRN_AUTO_KEY = PNM.PRN_AUTO_KEY WHERE PNM.PN_STRIPPED = ?', [$pn]);

               if(count($part) == 0) {
                   return response()->json(['result' => 'error', 'error' => 'Not found.', 'message' => 'PN not found'], 404);
               } // end if

               $query = "UPDATE PARTS_MASTER SET PRN_AUTO_KEY = " . $request->input('rank') . ", IC_UDF_002 = " . $request->input('price') . ", IC_UDF_001 = '" . Carbon::now()->format('Y-m-d') . "' WHERE PNM_AUTO_KEY = '" . $part[0]->pnm_auto_key . "'";

               //$res = DB::connection('oracle')->update($query);

               return response()->json(['result' => 'success', 'query' => $query]);
           }
        catch(\Exception $e)
           {
               return response()->json(['result' => 'error', 'error' => 'Database error.', 'message' => $e->getMessage()], 500);
           } // End try...catch
    } // end function

You can see I have this line //$res = DB::connection('oracle')->update($query); commented out because when not commented out the endpoint just "spins" without error until it times out. If I take the returned query and paste it into DataGrip, the record is updated in 93ms.

UPDATE PARTS_MASTER SET PRN_AUTO_KEY = 2, IC_UDF_002 = 85000, IC_UDF_001 = '2020-07-06' WHERE PNM_AUTO_KEY = '267105'

I have tried everything I could think of to change this behavior. I am hoping fresh eyes will see something I am missing.