Sample file to reproduce the bug. Use the steps from comment
TestConditionalFormatting_1.ods (application/vnd.oasis.opendocument.spreadsheet), 8.53 KB, created by szyb on 2016-06-15 08:44:59 UTC
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Creator: szyb
Created: 2016-06-15 08:44:59 UTC
Size: 8.53 KB

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Attachments on bug 100393: 125664