Stored procedure exception - Mysql.Data 8.0.21.0 (no replies)

Hi,
with nuget package mysql.data (version 8.0.21.0), I receive an exception "MySqlException: Incorrect routine name ''" when I try to access a stored procedure.

If I get back to the version 8.0.20.0 all is working well.

It's a bug or how can I solve this problem?

Thank you for your support.