Atomic CREATE OR REPLACE silently breaks the foreign key

--source include/have_innodb.inc

create table t1 (pk int primary key, a int) engine=InnoDB;

create table t2 (pk int primary key, b int, foreign key(b) references t1(pk)) engine=InnoDB;

insert into t1 values (1,10),(2,20);

insert into t2 values (1,1),(2,2);

create or replace table t1 (pk int primary key, a int) engine=InnoDB;

select * from t1;

select * from t2;

show create table t2;

drop table if exists t2, t1;

create table t1 (pk int primary key, a int) engine=InnoDB;

create table t2 (pk int primary key, b int, foreign key(b) references t1(pk)) engine=InnoDB;

insert into t1 values (1,10),(2,20);

insert into t2 values (1,1),(2,2);

create or replace table t1 (pk int primary key, a int) engine=InnoDB;

select * from t1;

pk      a

select * from t2;

pk      b

1       1

2       2

show create table t2;

Table   Create Table

t2      CREATE TABLE `t2` (

  `pk` int(11) NOT NULL,

  `b` int(11) DEFAULT NULL,

  PRIMARY KEY (`pk`),

  KEY `b` (`b`),

  CONSTRAINT `1` FOREIGN KEY (`b`) REFERENCES `#sql-create-2e1de2-4-10` (`pk`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_uca1400_ai_ci