Fix SVG rendering error in def update_background (#30490)

AasmaGupta · AASMA GUPTA · timhoffm · web-flow · commit 0056a47621dd · 2025-09-02T12:43:29.000-04:00
Check if saving before updating blitting background

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Co-authored-by: AASMA GUPTA &lt;aasmagupta@Aasmas-Mac.local&gt;
Co-authored-by: Tim Hoffmann &lt;2836374+timhoffm@users.noreply.github.com&gt;
diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
@@ -2172,6 +2172,8 @@ def update_background(self, event):
         # `release` can call a draw event even when `ignore` is True.
         if not self.useblit:
             return
+        if self.canvas.is_saving():
+            return  # saving does not use blitting
         # Make sure that widget artists don't get accidentally included in the
         # background, by re-rendering the background if needed (and then
         # re-re-rendering the canvas with the visible widget artists).
