Liquibase diff does not work for #SecondaryTable - spring

Question

If I add to my spring-boot / hibernate app an entity with secondary table, defined e.g. like this (taken from https://www.baeldung.com/jpa-mapping-single-entity-to-multiple-tables):
#Entity
#Table(name = "meal")
#SecondaryTable(name = "allergens", pkJoinColumns = #PrimaryKeyJoinColumn(name = "meal_id"))
class Meal {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "id")
Long id;
#Column(name = "name")
String name;
#Column(name = "description")
String description;
#Column(name = "price")
BigDecimal price;
#Embedded
Allergens allergens;
// standard getters and setters
}
#Embeddable
class Allergens {
#Column(name = "peanuts", table = "allergens")
boolean peanuts;
#Column(name = "celery", table = "allergens")
boolean celery;
#Column(name = "sesame_seeds", table = "allergens")
boolean sesameSeeds;
// standard getters and setters
}
and I run liquibase diff command to see what is the difference between entities in code and the underlying database (PostgreSQL or MySQL - it does not matter), I get only one change set:
<changeSet author="jakub (generated)" id="1585730629323-1">
<createTable tableName="meal">
<column autoIncrement="true" name="id" type="BIGINT">
<constraints nullable="false" primaryKey="true" primaryKeyName="mealPK"/>
</column>
<column name="description" type="VARCHAR(255)"/>
<column name="name" type="VARCHAR(255)"/>
<column name="price" type="numeric(19, 2)"/>
</createTable>
</changeSet>
for table meal but nothing for table allergens!
It looks like Liquibase knows that allergens columns belong to another (secondary) table, but does not create changeSet for it. Is it a bug in Liquibase?
If I let Hibernate generate the tables, it correctly creates also secondary allergens table in database. If I now run diff command second time, it generates changeSet which is about to delete allergens table from database - that`s bad. Any ideas how to force Liquibase to recognize the secondary table?
My Maven profile used for running the diff is:
<profile>
<id>db-diff-postgresql</id>
<build>
<plugins>
<plugin>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-maven-plugin</artifactId>
<version>3.8.7</version>
<executions>
<execution>
<id>generate-db-diff-postgresql</id>
<phase>process-test-resources</phase>
<goals>
<goal>diff</goal>
</goals>
<configuration>
<propertyFile>src/main/resources/db/liquibase-postgresql.properties</propertyFile>
<diffChangeLogFile>src/main/resources/db/changelogs/postgresql/changelog_diff_postgresql_${maven.build.timestamp}.xml</diffChangeLogFile>
<logging>debug</logging>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</profile>
and liquibase-postgresql.properties is:
changeLogFile= src/main/resources/db/db.changelog.xml
driver= org.postgresql.Driver
url= jdbc:postgresql://localhost/myApp
username= postgres
password= password
referenceUrl= hibernate:spring:myapp.jpa.entity?dialect=org.hibernate.dialect.PostgreSQLDialect&hibernate.physical_naming_strategy=org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy&hibernate.implicit_naming_strategy=org.springframework.boot.orm.jpa.hibernate.SpringImplicitNamingStrategy
Here: https://liquibase.jira.com/browse/CORE-3029 it seems to be the same problem, but not answered...
Thanks for any advice.