PPT detected as 'application/x-ole-storage'

[MrSwed]

The file for which the detection is inaccurate 2.zip

Expected MIME type application/vnd.ms-powerpoint

Returned MIME type application/x-ole-storage

Version of the library you are using v1.4.1

Output of go version go version go1.16.15 linux/amd64

Additional context https://www.htmlstrip.com/mime-file-type-checker and console command file --mime-type 2.ppt give correct results