We have had some reports of this but it is not a Keynote Manager issue.
The delineation of ‘labor’ between Keynote Manager and Revit is as follows. Keynote Manager manages the keynote data including updating, saving, and modifying the keynote source data (either text file or cloud services project). Keynote Manager also provides this data to Revit and in some cases (when you use the KM keynote apply tools) sets the keynote parameter on objects. Revit then takes that keynote data along with the keynote parameter data for elements in the model and displays keynote tags, constructs legends, displays them on sheets, etc.
If the keynote data itself is not correct or if parameter values are not set properly this may be a KM issue; if the parameters are set but the tags and/or legends are not constructing properly or showing properly on sheets that is a Revit issue and you will need to contact Autodesk or your re-seller to troubleshoot. You can also find some information on this issue on the Autodesk forums here.