diff --git a/jbi/bugzilla/service.py b/jbi/bugzilla/service.py
index 71df001e..8267144a 100644
--- a/jbi/bugzilla/service.py
+++ b/jbi/bugzilla/service.py
@@ -40,10 +40,15 @@ def refresh_bug_data(self, bug: Bug):
         """Re-fetch a bug to ensure we have the most up-to-date data"""
 
         refreshed_bug_data = self.client.get_bug(bug.id)
-        # When bugs come in as webhook payloads, they have a "comment"
-        # attribute, but this field isn't available when we get a bug by ID.
-        # So, we make sure to add the comment back if it was present on the bug.
-        updated_bug = refreshed_bug_data.model_copy(update={"comment": bug.comment})
+        # When bugs come in as webhook payloads, they have "comment" and "attachment"
+        # attributes, but these fields aren't available when we get a bug by ID.
+        # So, we make sure to add them back if they were present on the bug.
+        updated_bug = refreshed_bug_data.model_copy(
+            update={
+                "comment": bug.comment,
+                "attachment": bug.attachment,
+            }
+        )
         return updated_bug
 
     def list_webhooks(self):
diff --git a/tests/unit/bugzilla/test_service.py b/tests/unit/bugzilla/test_service.py
new file mode 100644
index 00000000..e35b7760
--- /dev/null
+++ b/tests/unit/bugzilla/test_service.py
@@ -0,0 +1,38 @@
+import pytest
+
+from jbi import bugzilla
+
+
+@pytest.fixture
+def bugzilla_client(settings):
+    return bugzilla.client.BugzillaClient(
+        base_url=settings.bugzilla_base_url, api_key=settings.bugzilla_api_key
+    )
+
+
+@pytest.fixture
+def bugzilla_service(bugzilla_client):
+    return bugzilla.service.BugzillaService(bugzilla_client)
+
+
+def test_refresh_bug_data_keeps_comment_and_attachment(
+    bugzilla_service, mocked_responses, bug_factory, settings
+):
+    bug = bug_factory(with_attachment=True, with_comment=True)
+    # https://bugzilla.readthedocs.io/en/latest/api/core/v1/bug.html#get-bug
+    mocked_responses.add(
+        "GET",
+        f"{settings.bugzilla_base_url}/rest/bug/%s" % bug.id,
+        json={
+            "bugs": [
+                {
+                    "id": bug.id,
+                }
+            ],
+        },
+    )
+
+    updated = bugzilla_service.refresh_bug_data(bug)
+
+    assert updated.comment == bug.comment
+    assert updated.attachment == bug.attachment