[galaxy-dev] Get Data and 'xlsx'

It looks like uploading 'xlsx' data through 'Get Data' is not working. When I try this on my local Galaxy (v18.05) and on usegalaxy.org it gets automatically converted to 'BLAST xml' when using Automatic Detection. If I select 'xlsx' during uploading I get the error message ( Warning: The file 'Type' was set to 'xlsx' but the file does not appear to be of that type ) Does anyone have any suggestions?