Missing filter condition in execution plan containing lookup join with mysql jdbc connector

CREATE TABLE default_catalog.default_database.a (
  ip string, 
  proctime as proctime()
) 
WITH (
  'connector' = 'datagen'
);

create table b (
  ip varchar(20), 
  type int
);  

explain SELECT * FROM default_catalog.default_database.a left join bnpmp_mysql_test.gem_tmp.b FOR SYSTEM_TIME AS OF a.proctime on b.type = 0 and a.ip = b.ip; 

...
== Optimized Execution Plan ==
Calc(select=[ip, PROCTIME_MATERIALIZE(proctime) AS proctime, ip0, type])
+- LookupJoin(table=[bnpmp_mysql_test.gem_tmp.b], joinType=[LeftOuterJoin], lookup=[ip=ip], select=[ip, proctime, ip, CAST(0 AS INTEGER) AS type, CAST(ip AS VARCHAR(2147483647)) AS ip0])
   +- Calc(select=[ip, PROCTIME() AS proctime])
      +- TableSourceScan(table=[[default_catalog, default_database, a]], fields=[ip])

...
== Optimized Execution Plan ==
Calc(select=[ip, PROCTIME_MATERIALIZE(proctime) AS proctime, ip0, type])
+- LookupJoin(table=[bnpmp_mysql_test.gem_tmp.b], joinType=[LeftOuterJoin], lookup=[type=0, ip=ip], where=[(type = 0)], select=[ip, proctime, ip, CAST(0 AS INTEGER) AS type, CAST(ip AS VARCHAR(2147483647)) AS ip0])
   +- Calc(select=[ip, PROCTIME() AS proctime])
      +- TableSourceScan(table=[[default_catalog, default_database, a]], fields=[ip])