Hi,
Your aggregated member is close to the correct (the pattern matching needs leading and trailing asterisks):
Aggregate(
Filter(Descendants([Issue].CurrentMember,[Issue].[Issue]),
[Issue].CurrentMember.Name MATCHES ".*Sketches.*"
)
)
We, however, do not recommend this solution since it has a risk of performance problems.
A workaround is to implement a new Javascript calculated custom field to filter the issues with the naming pattern using a new dimension.
Please, check a similar community post about this solution: Filter open issue by summary.
Kindly,
Janis, eazyBI support