Issues with `[jobs orderby=rand]` and pagination

I use Listable Theme and supposedly, [jobs orderby=rand] should randomize the listings that show - display them in random order. However, through the randomization it keeps showing duplicate listings. I assume that's a bug. How do you fix or avoid that?

Thanks in advance.

#### Steps to Reproduce
1. Listable Theme
2. Listings page
3. [jobs orderby=rand]

#### What I Expected
Show all listings in random order without duplicates

#### What Happened Instead
Showed listings in random order BUT duplicated some listings and didn't show others at all.

#### WordPress / WP Job Manager Version
WordPress 5.2.1

#### Browser / OS Version
Chrome

#### Screenshot / Video

#### Context / Source

Reproduce the issue on the Listings page using the [jobs orderby=rand] shortcode and pagination, comparing the displayed listings across pages. Trace how random ordering is applied to the paginated results; done means the listings remain randomized without duplicates and no listings are omitted.

Written by the indexing model from the issue text.