Not filetype set when buffer opened by vim-vebugger

[lervag]

First, I do:

1. vim src/file.f90
2. :VBGstartGDB ../a.out
3. Set a break point in src/sub.f90 with VBGtoggleBreakpoint sub.f90:<line>
4. <leader>dc

Now, since the break point is in a buffer that is not already open, vim-vebugger opens it for me. But the filetype is now empty, and so there is e.g. no syntax highlighting or similar. Of course, I can do filetype detect or set filetype=fortran, but I would expect this to occur automatically.

[ym1234]

I can confirm this on the latest version with neovim.
Is there is a reason it hasn't been fixed yet?