diff --git a/webapp/services/wim.py b/webapp/services/wim.py
index 15c1713..4dc66d9 100644
--- a/webapp/services/wim.py
+++ b/webapp/services/wim.py
@@ -125,7 +125,9 @@ def _split_lines(content):
     Rejoining with eol.join(...) reproduces a trailing newline because a
     trailing terminator yields a final empty element.
     """
-    return content.replace("\r\n", "\n").replace("\r", "\n").split("\n")
+    # Collapse any run of CRs before a newline (handles CRLF and a doubled
+    # \r\r\n that a bad CRLF-conversion can leave behind), then lone CR.
+    return re.sub(r"\r+\n", "\n", content).replace("\r", "\n").split("\n")
 
 
 # --- Shared regexes ---------------------------------------------------------