diff --git a/core/services/streams/pipeline.go b/core/services/streams/pipeline.go
index de52fed26e5..8a232029a82 100644
--- a/core/services/streams/pipeline.go
+++ b/core/services/streams/pipeline.go
@@ -31,7 +31,7 @@ type multiStreamPipeline struct {
 	runner    Runner
 	rrs       RunResultSaver
 	streamIDs []StreamID
-	vars      pipeline.Vars
+	newVars   func() pipeline.Vars
 }
 
 func NewMultiStreamPipeline(lggr logger.Logger, jb job.Job, runner Runner, rrs RunResultSaver) (Pipeline, error) {
@@ -71,16 +71,18 @@ func newMultiStreamPipeline(lggr logger.Logger, jb job.Job, runner Runner, rrs R
 	if err := validateStreamIDs(streamIDs); err != nil {
 		return nil, fmt.Errorf("invalid stream IDs: %w", err)
 	}
-	vars := pipeline.NewVarsFrom(map[string]interface{}{
-		"pipelineSpec": map[string]interface{}{
-			"id": jb.PipelineSpecID,
-		},
-		"jb": map[string]interface{}{
-			"databaseID":    jb.ID,
-			"externalJobID": jb.ExternalJobID,
-			"name":          jb.Name.ValueOrZero(),
-		},
-	})
+	vars := func() pipeline.Vars {
+		return pipeline.NewVarsFrom(map[string]interface{}{
+			"pipelineSpec": map[string]interface{}{
+				"id": jb.PipelineSpecID,
+			},
+			"jb": map[string]interface{}{
+				"databaseID":    jb.ID,
+				"externalJobID": jb.ExternalJobID,
+				"name":          jb.Name.ValueOrZero(),
+			},
+		})
+	}
 
 	return &multiStreamPipeline{
 		lggr.Named("MultiStreamPipeline").With("spec.ID", spec.ID, "jobID", spec.JobID, "jobName", spec.JobName, "jobType", spec.JobType),
@@ -122,7 +124,7 @@ func (s *multiStreamPipeline) StreamIDs() []StreamID {
 // The context passed in here has a timeout of (ObservationTimeout + ObservationGracePeriod).
 // Upon context cancellation, its expected that we return any usable values within ObservationGracePeriod.
 func (s *multiStreamPipeline) executeRun(ctx context.Context) (*pipeline.Run, pipeline.TaskRunResults, error) {
-	run, trrs, err := s.runner.ExecuteRun(ctx, s.spec, s.vars)
+	run, trrs, err := s.runner.ExecuteRun(ctx, s.spec, s.newVars())
 	if err != nil {
 		return nil, nil, fmt.Errorf("error executing run for spec ID %v: %w", s.spec.ID, err)
 	}