Labelbot recommending already labeled issues

[ChaiBapchya]

Here's an example

apache/mxnet#13941 (5 days ago)
apache/mxnet#13789 (19 days ago)
apache/mxnet#13788 (19 days ago)
apache/mxnet#13787 (19 days ago)
apache/mxnet#13753 (25 days ago)
Label bot recommended labels despite the user who created an issue labeled it himself (5 days ago)

[ChaiBapchya]

But surprisingly, these escape it

apache/mxnet#13924
apache/mxnet#13752