Exists subquery returns incorrect result when or condition involves null column

select *
from "scott".emp as e
where exists (
  select empno
  from "scott".emp as ee
  where e.empno = ee.empno or e.comm >= ee.sal
)

+-------+--------+-----------+------+------------+---------+---------+--------+
| EMPNO | ENAME  | JOB       | MGR  | HIREDATE   | SAL     | COMM    | DEPTNO |
+-------+--------+-----------+------+------------+---------+---------+--------+
|  7369 | SMITH  | CLERK     | 7902 | 1980-12-17 |  800.00 |         |     20 |
|  7499 | ALLEN  | SALESMAN  | 7698 | 1981-02-20 | 1600.00 |  300.00 |     30 |
|  7521 | WARD   | SALESMAN  | 7698 | 1981-02-22 | 1250.00 |  500.00 |     30 |
|  7566 | JONES  | MANAGER   | 7839 | 1981-02-04 | 2975.00 |         |     20 |
|  7654 | MARTIN | SALESMAN  | 7698 | 1981-09-28 | 1250.00 | 1400.00 |     30 |
|  7698 | BLAKE  | MANAGER   | 7839 | 1981-01-05 | 2850.00 |         |     30 |
|  7782 | CLARK  | MANAGER   | 7839 | 1981-06-09 | 2450.00 |         |     10 |
|  7788 | SCOTT  | ANALYST   | 7566 | 1987-04-19 | 3000.00 |         |     20 |
|  7839 | KING   | PRESIDENT |      | 1981-11-17 | 5000.00 |         |     10 |
|  7844 | TURNER | SALESMAN  | 7698 | 1981-09-08 | 1500.00 |    0.00 |     30 |
|  7876 | ADAMS  | CLERK     | 7788 | 1987-05-23 | 1100.00 |         |     20 |
|  7900 | JAMES  | CLERK     | 7698 | 1981-12-03 |  950.00 |         |     30 |
|  7902 | FORD   | ANALYST   | 7566 | 1981-12-03 | 3000.00 |         |     20 |
|  7934 | MILLER | CLERK     | 7782 | 1982-01-23 | 1300.00 |         |     10 |
+-------+--------+-----------+------+------------+---------+---------+--------+
(14 rows)

+-------+--------+----------+------+------------+---------+---------+--------+
| EMPNO | ENAME  | JOB      | MGR  | HIREDATE   | SAL     | COMM    | DEPTNO |
+-------+--------+----------+------+------------+---------+---------+--------+
|  7499 | ALLEN  | SALESMAN | 7698 | 1981-02-20 | 1600.00 |  300.00 |     30 |
|  7521 | WARD   | SALESMAN | 7698 | 1981-02-22 | 1250.00 |  500.00 |     30 |
|  7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 |     30 |
|  7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 |    0.00 |     30 |
+-------+--------+----------+------+------------+---------+---------+--------+

EnumerableSort(sort0=[$0], sort1=[$5], dir0=[ASC], dir1=[ASC])
  EnumerableHashJoin(condition=[AND(=($0, $10), =($6, $11))], joinType=[semi])
    EnumerableTableScan(table=[[scott, EMP]])
    EnumerableNestedLoopJoin(condition=[OR(=($2, $0), >=($3, $1))], joinType=[inner])
      EnumerableCalc(expr#0..7=[{inputs}], EMPNO=[$t0], SAL=[$t5])
        EnumerableTableScan(table=[[scott, EMP]])
      EnumerableCalc(expr#0..7=[{inputs}], EMPNO=[$t0], COMM=[$t6])
        EnumerableTableScan(table=[[scott, EMP]])

EnumerableHashJoin(condition=[AND(=($0, $10), =($6, $11))], joinType=[semi])

e.empno = ee.empno or e.comm >= ee.sal

AND(=($0, $10), =($6, $11))