A report in bug 1385630 mentions that container icons also have this problem. If it's reproducible, then you have the reason and a way to test (in bug 1385630).
I can't reproduce this, I'm going to close this. Feel free to reopen if this still happens.
Status: NEW → RESOLVED
Last Resolved: 11 months ago
Resolution: --- → WORKSFORME
Summary: Containers icons now showing after app update restart. → Containers icons not showing after app update restart.
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