Missing fields separator for inline fields inside a fieldset

Fist of all, I have to say that your module is a must have and should be in Views Core to my opinion. I can't figure it could be on minimal maintenance.
I'm using Views Fieldsets to group fields in Views and add a Bootstrap col class for this group using the fieldset class. I configure the field sets to be DIVs an I don't use collapsible propriety.

i.e.:
Fieldset (div class="container")
Fieldset (div class="row")
Fieldset (div class="col-xs-4 col-sm-3 col-md-2 col-lg-1")
Field 1
Field 2
Field 3
Fieldset (div class="col-xs-8 col-sm-9 col-md-10 col-lg-11")
Field 4
Field 5

It works fine except one thing. The separator between inline fields is not displayed (that's the bug) so inline fields are squished up next to each other. In the exemple above, if Fields 1, 2 and 3 are inline, they would be displayed like "Field 1 Field 2 Field 3" instead of "Field 1 - Field 2 - Field 3" (if separator as been set up to hyphen in Views settings).

Would you please look at this bug which is very annoying because I need inline fields in Views, and Views Fieldsets is the only way I can group fields and add them a Bootstrap col class.

I'm using Drupal 7.28 - Views 7.x-3.8 - Views Fieldsets 7.x-1.2