Previous buffer duplicated in split after openning new buffer in tab

[Xunius]

Steps I took:

1. in a vim window, open file1, file2 and file3 in separate tabs.
2. close the tab for file3, go to the tab for file2
3. use <leader>bv to open bufexplore in a vertical split.
4. now the file3 entry is in the list, navigate to that, and hit t to open it in a new tab.

I assume this would get me back to the state after step 1. However if I navigate to the tab for file2 (where I launched bufexplore), I saw the same file opened twice in a vertical split, like below:

-----------------------------------------------------
|  file 2 contents       |      file 2 contents    |
|                        |                         |
|                        |                         |
-----------------------------------------------------

I think this is rather counter-intuitive. Is there any easy way of getting around this?
I'm using vim 8.1.

Thanks!

[jlanzarotta]

Hum... Let me take a look at this...