When using EntityManager Query setFirstResult and setMaxResults and exuxute the same query again, but just with setMaxResults it results in a NullPointer.

The problem is in the caching of the parameters when a same query is executed. There is a parameter validation here that look wrong:JdbcOperationQuerySelect.isCompatible

Current:
return value != (int) jdbcParameterBinding.getBindValue();

But should be:
return value == (int) jdbcParameterBinding.getBindValue();

java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "org.hibernate.query.spi.Limit.getFirstRow()" is null
at org.hibernate.sql.ast.spi.AbstractSqlAstTranslator$OffsetReceivingParameterBinder.bindParameterValue(AbstractSqlAstTranslator.java:4120) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.jdbc.internal.DeferredResultSetAccess.bindParameters(DeferredResultSetAccess.java:199) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.jdbc.internal.DeferredResultSetAccess.executeQuery(DeferredResultSetAccess.java:228) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.jdbc.internal.DeferredResultSetAccess.getResultSet(DeferredResultSetAccess.java:163) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.jdbc.internal.JdbcValuesResultSetImpl.advanceNext(JdbcValuesResultSetImpl.java:254) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.jdbc.internal.JdbcValuesResultSetImpl.processNext(JdbcValuesResultSetImpl.java:134) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.jdbc.internal.AbstractJdbcValues.next(AbstractJdbcValues.java:19) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.internal.RowProcessingStateStandardImpl.next(RowProcessingStateStandardImpl.java:66) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:198) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.results.spi.ListResultsConsumer.consume(ListResultsConsumer.java:33) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.doExecuteQuery(JdbcSelectExecutorStandardImpl.java:361) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.executeQuery(JdbcSelectExecutorStandardImpl.java:168) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.exec.internal.JdbcSelectExecutorStandardImpl.list(JdbcSelectExecutorStandardImpl.java:93) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.sql.exec.spi.JdbcSelectExecutor.list(JdbcSelectExecutor.java:31) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.lambda$new$0(ConcreteSqmSelectQueryPlan.java:110) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.withCacheableSqmInterpretation(ConcreteSqmSelectQueryPlan.java:303) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.query.sqm.internal.ConcreteSqmSelectQueryPlan.performList(ConcreteSqmSelectQueryPlan.java:244) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.query.sqm.internal.QuerySqmImpl.doList(QuerySqmImpl.java:518) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.query.spi.AbstractSelectionQuery.list(AbstractSelectionQuery.java:367) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]
at org.hibernate.query.Query.getResultList(Query.java:119) ~[hibernate-core-6.2.5.Final.jar:6.2.5.Final]