Office 365 API - create folder bug and PUT file "content-length"

Question

Creating folder issue

Creating new subfolder with the same name as parent folder error

Here is my request: PUT {base-url}/Files/getByPath('/Bug/Bug') - fails with 409, "NameAlreadyExists"

But, this will work: PUT {base-url}/Files/getByPath('/Bug/Bug/Bug2')

NOTICE: There is no folder /Bug/Bug, before each test request I am removing this folder

Here is my video for this bug: https://www.youtube.com/watch?v=NknDvL1rVsM&feature=youtu.be

Content length issue

Request: GET {base-url}/Files/getByPath('/Some.pdf')/content There is no "content-length" header in response headers. Why?

SUMMARY:

1. Can't create folder /Bug/Bug or /Foo/Foo or /New/New or /Foo/Bar/Foo

2. Cannot get "content-length" when downloading file through API