If i put something new (!) into the static folder of an app, the first access to it will fail,
but if I try it again it will work, even if I remove the file from static folder.
Then, the content is sometimes cut off by 8192 (file size was 9049).
No HTTP proxies used, just simple a wget command line tool using the URL like that:
https://splunk:8000/en-GB/static/app//item.txt
seems to be fixed in 6.2.1, thx!