It is not possible to drag & drop items from the backlog query to the map in TFS when using Edge.
Issues can arise when using templates in languages other than English. This may also result in an empty default query. You can however define your own queries and use these instead.
SpecMap requires certain fields to be present in your template; if the fields are missing, errors will occur. This means that custom templates are not currently supported.
Synchronisation issues can occur in setups with high latency, e.g. where the server is in a different country from the users. This is more likely to occur using the on-premise (TFS) extension. Please open a support request if you are experiencing long delays, particularly when receiving messages that the map has been updated and your changes cannot be saved as a result.
SpecMap is not fully compatible with the new navigation layout in Azure DevOps (VSTS) (currently only available as a preview). The backlog queries are empty when not using the default team. A workaround is to define your own queries.