Can Seeker set which graphs priority to follow in runtime?

I have two graphs (Point Graph, Grid Graph) in the Astar path inspector, Settings->Pathfinding->Prioritize Graphs is checked and Priority Limit = 2. The agent can follow from Grid Graph to Point Graph, but cannot back to Grid Graph.

I really recommend not mixing graph types. Most often it only leads to trouble.
Agents can specify that they want to path only on a specific graph (or graphs) (see NNConstraint.graphMask in docs), and/or they can prioritize graphs so that some are chosen with a higher priority when within a distance limit.