[itsme]

I noticed a second issue here: when transposing within the text editor the "Default display localization" shall be ignored. As the name says it's only relevant for the display.
In my case "Default source localization" is "Default", "Default display localization" is "Scandinavian". MobileSheets transposes Bb to H, correct would be transposing to B.
   

When trying to transpose this file again MobileSheets would fail as "Default source localization" is still "Default" so H is not a valid chord.