Changes with pt-osc are executed multiple times (liquibase 4.19.1)

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With the upgrade of liquibase from 4.19.0 to 4.19.1 all the changesets are executed multiple times when percona toolkit is used.

This shows up in the integration tests:

[INFO] Altering new table...
[INFO] 	(in cleanup) Error altering new table `testdb`.`_person_new`: DBD::mysql::db do failed: Duplicate key name 'emailIdx' [for Statement "ALTER TABLE `testdb`.`_person_new` ADD UNIQUE INDEX emailIdx (email(10))"] at /home/runner/work/liquibase-percona/liquibase-percona/target/percona-toolkit/percona-toolkit-3.5.1/bin/pt-online-schema-change line 9511.
[INFO] 
[INFO] 2023-03-02T12:01:24 Dropping new table...
[INFO] 2023-03-02T12:01:24 Dropped new table OK.
[INFO] `testdb`.`person` was not altered.
[INFO] Error altering new table `testdb`.`_person_new`: DBD::mysql::db do failed: Duplicate key name 'emailIdx' [for Statement "ALTER TABLE `testdb`.`_person_new` ADD UNIQUE INDEX emailIdx (email(10))"] at /home/runner/work/liquibase-percona/liquibase-percona/target/percona-toolkit/percona-toolkit-3.5.1/bin/pt-online-schema-change line 9511.
[INFO] 

This is the second run and the change has already been applied, so it can't be applied once more...

The change in liquibase that introduced this is liquibase/liquibase#3574 - for creating the log of the sql statements, the method generate of the statement is called. And that's when pt-osc is executed...