UTF-8 file is detected as Windows-1258 - Vietnamese (SBCSCodePageEncoding)

[Jujubeeeee]

Hi, there is a txt file with UTF-8, but is detected as SBCSCodePageEncoding. Thanks for your help!
Brazil_Physical_Addresses_UTF8.txt

[304NotModified]

results currently:

same results when using DetectFromBytes

windows 1258 is indeed wrong, https://en.wikipedia.org/wiki/Windows-1258 - Vietnamese