Reproduction: Create a plan, go to miscellaneous tab, uncheck the default selected repo, and save. When the page reloads, the default selection will reappear. If the plan is saved with at least one checked repo, then subsequently unselecting all repos will work.
Reproduction: Create a plan, go to miscellaneous tab, uncheck the default selected repo, and save. When the page reloads, the default selection will reappear. If the plan is saved with at least one checked repo, then subsequently unselecting all repos will work.