The last SR for QlikView - see: QlikView 12.50 SR4 is now available! - Page 2 - Qlik Community - 1783889 - changed again the formatting settings for Excel exports. Yes, it's known that there could be various errors by the export depending on the scenario in which it's used.
Avoiding any issues with it by setting everything to text is IMO not really a solution else I suggest to implement granular customizable settings at least at document level but better on a dimension/expression level - maybe additionally to the settings within the tab Numbers.
Further a detailed documentation not only to the settings itself else also about the technically background and potentially conflicts in regard to the Excel releases, used platforms, regional settings and so on would be very useful - because a valid problem-solution might not only be approached from the Qlik side else also from the target-environment.
Many thanks!
- Marcus