diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index 35cff69..cb8e2db 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.md
@@ -35,3 +35,11 @@ For release specific notes visit the [ClusterCockpit Documentation](https://clus
 - A performance and energy footprint can be freely configured on a per
   subcluster base. One can filter for footprint statistics for running and
   finished jobs.
+
+## Known issues
+
+- Currently energy footprint metrics of type energy are ignored for calculating
+  total energy.
+- Resampling for running jobs only works with cc-metric-store
+- With energy footprint metrics of type power the unit is ignored and it is
+  assumed the metric has the unit Watt.
diff --git a/internal/repository/job.go b/internal/repository/job.go
index 592997e..5f73bad 100644
--- a/internal/repository/job.go
+++ b/internal/repository/job.go
@@ -604,9 +604,10 @@ func (r *JobRepository) UpdateEnergy(
 	for _, fp := range sc.EnergyFootprint {
 		if i, err := archive.MetricIndex(sc.MetricConfig, fp); err == nil {
 			// Note: For DB data, calculate and save as kWh
-			// Energy: Power (in Watts) * Time (in Seconds)
-			if sc.MetricConfig[i].Energy == "energy" { // this metric has energy as unit (Joules)
+			if sc.MetricConfig[i].Energy == "energy" { // this metric has energy as unit (Joules or Wh)
+				// FIXME: Needs sum as stats type
 			} else if sc.MetricConfig[i].Energy == "power" { // this metric has power as unit (Watt)
+				// Energy: Power (in Watts) * Time (in Seconds)
 				// Unit: ( W * s ) / 3600 / 1000 = kWh ; Rounded to 2 nearest digits
 				energy = math.Round(((LoadJobStat(jobMeta, fp, "avg")*float64(jobMeta.Duration))/3600/1000)*100) / 100
 			}