Должно быть исправлено. Ставьте свежий Cumualative Update...
Released Cumulative Updates for Microsoft Dynamics NAV 2013 R2
https://mbs2.microsoft.com/Knowledge...,en-us,2914930
Cumulative Update 10 for Microsoft Dynamics NAV 2013 R2 (Build 37563)
https://mbs2.microsoft.com/Knowledge...,en-us,2984452
Local application hotfixes
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RU - Russia
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359769 If you insert a picture or a cell comment in an Excel template, the system will build a corrupted Excel report file in the Russian version. Finance ExcelReportBuilder
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