we just did a in place upgrade to mssql 2022 standard, from 2016 standard.
open up database, maintenance job all have blank connections. unable to change the connection. had to recreate all the jobs.
Maintenance Plans are well known for their 'features'.
Most people tend to use
SQL Server Backup, Integrity Check, and Index and Statistics Maintenance
or
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If you were using SSMS 21, it may have been recently fixed: