Second SELECT from VIEW based on information_schema.optimizer_trace gives NULL result

--source include/have_sequence.inc

create table t1(a int, b int);

insert into t1 

select seq,seq from seq_1_to_5;

create table t2(a int, b int, key(a));

insert into t2

select A.seq,B.seq from seq_1_to_25 A, seq_1_to_2 B;

create table t3(a int, b int, key(a));

insert into t3

select A.seq,B.seq from seq_1_to_5 A, seq_1_to_3 B;

create table t10 (grp_id int, col1 int, key(grp_id));

insert into t10

select A.seq, B.seq from seq_1_to_100 A, seq_1_to_100 B;

create table t11 (col1 int, col2 int);

insert into t11

select A.seq, A.seq from seq_1_to_10 A;

analyze table t1,t2,t3,t10,t11 persistent for all;

set optimizer_trace=1;

explain 

select * from

  (

    (t1 left join t2 on t2.a=t1.b)

    left join t3 on t3.a=t1.b

  ) left join (select grp_id, count(*)

               from t10 left join t11 on t11.col1=t10.col1

               group by grp_id) T on T.grp_id=t1.b;

create view v1 as select 

  json_detailed(

    json_remove(

      json_extract(trace, '$**.choose_best_splitting')

      , '$[0].split_plan_search[0]'

    )

  ) as JS

from information_schema.optimizer_trace;

select * from v1;

select * from v1;

drop view v1;

drop table t1,t2,t3,t10,t11;

set optimizer_trace=DEFAULT;

JS

[

    {

        "considered_keys": 

        [

            {

                "table_name": "t10",

                "index": "grp_id",

                "rec_per_key": 100,

                "param_tables": 1

            }

        ],

        "refills": 5,

        "spl_pd_boundary": 2,

        "split_plan_search": 

        [],

        "lead_table": "t10",

        "index": "grp_id",

        "parts": 1,

        "split_sel": 0.001,

        "cost": 2536,

        "records": 100,

        "refills": 5,

        "chosen": true

    }

]

select * from v1;

JS

NULL

JS

[

    {

        "considered_keys": 

        [

            {

                "table_name": "t10",

                "index": "grp_id",

                "rec_per_key": 100,

                "param_tables": 1

            }

        ],

        "refills": 5,

        "spl_pd_boundary": 2,

        "split_plan_search": 

        [],

        "lead_table": "t10",

        "index": "grp_id",

        "parts": 1,

        "split_sel": 0.001,

        "cost": 2536,

        "records": 100,

        "refills": 5,

        "chosen": true

    }

]

select * from v1;

JS

[

    {

        "considered_keys": 

        [

            {

                "table_name": "t10",

                "index": "grp_id",

                "rec_per_key": 100,

                "param_tables": 1

            }

        ],

        "refills": 5,

        "spl_pd_boundary": 2,

        "split_plan_search": 

        [],

        "lead_table": "t10",

        "index": "grp_id",

        "parts": 1,

        "split_sel": 0.001,

        "cost": 2536,

        "records": 100,

        "refills": 5,

        "chosen": true

    }

]