Dropbox API Bug: "Restricted Content" Error for Unrestricted Files

Hello,

There seems to be an odd bug in the Dropbox API whereby if you try to download a plain text file containing nothing but a period, you receive a "Restricted Content" error and it refuses to download. One of our customers came across this after she had deleted content from a text file in our writing app but had left the full stop in by mistake.

Reproduction steps:

- I'm using the Objective-C API (API 2).

1. Upload a plain text UTF-8 file containing nothing other than a period (.) character.

2. Using the API, set up a download task:

DBDownloadUrlTask *downloadTask = [self.dropboxClient.filesRoutes downloadUrl:dropboxPathToPlainTextFile overwrite:YES destination:pathToSaveLocally];

[downloadTask setResponseBlock:^(id result, id taskError, DBRequestError *genericError, NSURL *destinationURL){
        
	if (result == nil && genericError != nil)
	{
            	NSLog (@"%@", genericError, nil);
		NSLog (@"taskError", nil);
        }
}];

Expected result: the file should download without problem - it's not restricted but is just a plain text file containing a period.

Result: "Restricted content" error:

{
    ".tag" = path;
    path =     {
        ".tag" = "restricted_content";
    };
}
DropboxHttpError[{
    ErrorContent = "path/restricted_content/";
    RequestId = c4ac89c1b2bc6ad61c7255c1ef94a287;
    StatusCode = 409;
    UserMessage = nil;
}];

Thanks!