diff --git a/bar.go b/bar.go
index 761c353..6f28a7e 100644
--- a/bar.go
+++ b/bar.go
@@ -506,6 +506,8 @@
 	if resP.truncate {
 		trunc := strings.NewReader(runewidth.Truncate(stripansi.Strip(bufP.String()), resP.width, "…"))
 		bufP.Reset()
+		bufB.Reset()
+		bufA.Reset()
 		return trunc, nil
 	}