diff --git a/.github/workflows/vuln.yml b/.github/workflows/vuln.yml
deleted file mode 100644
index 497ae80b..00000000
--- a/.github/workflows/vuln.yml
+++ /dev/null
@@ -1,19 +0,0 @@
-name: govulncheck
-
-on:
-  push:
-    branches: ["*"]
-    paths-ignore:
-      - '**/*.md'
-  pull_request:
-    branches: ["*"]
-    paths-ignore:
-      - '**/*.md'
-
-jobs:
-  vulncheck:
-    runs-on: ubuntu-latest
-    name: govulncheck
-    steps:
-      - id: govulncheck
-        uses: golang/govulncheck-action@v1
diff --git a/pkg/kgo/source.go b/pkg/kgo/source.go
index 316eee27..603b0864 100644
--- a/pkg/kgo/source.go
+++ b/pkg/kgo/source.go
@@ -1192,7 +1192,10 @@ func (o *cursorOffsetNext) processRespPartition(br *broker, rp *kmsg.FetchRespon
 		o.hwm = rp.HighWatermark
 	}
 
-	aborter := buildAborter(rp)
+	var aborter aborter
+	if br.cl.cfg.isolationLevel == 1 {
+		aborter = buildAborter(rp)
+	}
 
 	// A response could contain any of message v0, message v1, or record
 	// batches, and this is solely dictated by the magic byte (not the