I found it is strange that Insync won’t upload local changes if the files have a specific extension such as “.lock”.
For example, I create a file named “poetry.lock”, Insync just totally ignore this file.
But if I upload this file through the website, it can be correctly downloaded, and then I delete this file, this change will be uploaded.
So it looks like, for at least this specific extension, Insync will ignore the creation of files?