Unable to group in tree view when results are grouped by category

[Plinsboorg]

first of all, thank you so much for the plugin. it helps a lot. I see only one issue in my setup: grouping to the tree view is not working with the queries where I use "Group results by" feature. for example when I group by project or by issue category.

this is how the issues grouped by category look in plain structure:

this is how grouping by category brakes when I enable tree view.

this is the setting in custom queries where issues grouping can be enabled:

Environment: Redmine version 5.1.1.stable Ruby version 3.2.3-p157 (2024-01-18) [x86_64-linux] Rails version 6.1.7.6 Environment production Database adapter PostgreSQL Mailer queue ActiveJob::QueueAdapters::AsyncAdapter Mailer delivery smtp