diff --git a/runner/sidecar/sidecar.go b/runner/sidecar/sidecar.go
index 95f440e7..2609b0e4 100644
--- a/runner/sidecar/sidecar.go
+++ b/runner/sidecar/sidecar.go
@@ -364,12 +364,13 @@ func connectSources(ctx context.Context, toMain func([]byte) error) error {
 				})
 				if i == 0 && replica == 0 {
 					go wait.JitterUntil(func() {
-						if handler.offset > 0 {
-							nextOffset, err := client.GetOffset(x.Topic, handler.partition, sarama.OffsetNewest)
+						offset, partition := handler.offset, handler.partition // copy these variables, so changes are not a problem
+						if offset > 0 {
+							nextOffset, err := client.GetOffset(x.Topic, partition, sarama.OffsetNewest)
 							if err != nil {
 								logger.Error(err, "failed to get offset", "source", sourceName)
-							} else if pending := nextOffset - 1 - handler.offset; pending >= 0 {
-								logger.Info("setting pending", "source", sourceName, "pending", pending, "nextOffset", nextOffset, "handlerOffset", handler.offset)
+							} else if pending := nextOffset - 1 - offset; pending >= 0 {
+								logger.Info("setting pending", "source", sourceName, "pending", pending, "nextOffset", nextOffset, "handlerOffset", offset)
 								withLock(func() { status.SourceStatuses.SetPending(sourceName, uint64(pending)) })
 							}
 						}