Different delete result by the same function - sql

Question

I'm removing object in loop by using Crud repository delete function. My object have relation which also should be removed with it (orphanRemoval) + cascadeType = ALL.
But I noticed that first iteration removes object correctly with relations and this sql looks:
Hibernate:
delete
from
base_interval_last_modifications
where
base_interval_id=?
Hibernate:
delete
from
visit
where
id=?
Hibernate:
delete
from
last_modification
where
id=?
Hibernate:
delete
from
base_interval
where
id=?
Second iteration produces this sql statement:
Hibernate:
delete
from
visit
where
id=?
Could someone explain me how its possible that the same function on the same type of object generates another statement and in fact doesnt remove all relations correctly?
UPDATE "more code":
In first loop baseInterval is removed correctly and workInterval is untouched but in second loop only visit is removed without baseInterval.
#Entity
class Visit(
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
var id: Int? = null,
#OneToOne(cascade = [CascadeType.ALL], orphanRemoval = true)
#JoinColumn
var baseInterval: BaseInterval? = null,
)
#Entity
class BaseInterval(
id: Int? = null,
#OneToOne(mappedBy = "baseInterval")
var visit: Visit? = null,
#ManyToOne
#JsonIgnore
var workInterval: WorkInterval? = null
)
Loop
futureVisits
.forEach {
visitRepository.delete(it)
}