I have found a strange issue that PDF encoding is changed when downloading it to Macbook.
Dowloaded pdf encoding is different from the preview mode (in the browser)
In preview mode and dowloaded pdf is visually equal. However, I don't add the text to website when it is downloaded. In preview mode, I can copy and add easily.
Text are copied from Preview mode (google chrome) and downloaded pdf in apple preview app and then paste to decode tool.
I am using Macbook air / Apple preview app