adding shordcode

WP Install: 4.4.1
Job Manager Installed: 7.25
Website URL: https://warnath-industrieservice.com/stellenangebote/engineering/

Hello Thomas, I need help!!

I use job Manager for a while but since one of the latest WP updates I have a problem.
I would not call it a bug of your excellent plugin but it is buggin me ?? and you might be able to help me solve it.

The Problem:
WP nowadays does not allow Shortcodes inside href tags for security reasons, which breaks a lot of plugins. Im my case, I use the shortcode [job_id] inside a href tag to open/close a TAB containing the job details and link to the form.

The only way to get around this problem, is to write a new shortcode to your plugin that creates the complete link, which I did. I added a new shortcode to frontend-shortcodes.php and it works fine except one last problem.

I need to show the date of the listing which is written in job_field8.

My question for you:
How do I get the value of job_field8 inside a shordcode?

I tried some ways but never get any output to show like:
.$jobman_shortcode_job->job_field8.

This is what I have so far:

case 'job_id_tab':

			return "<a href='#".$jobman_shortcode_job->ID."' class='accordion-toggle' data-toggle='collapse' data-parent='#pacc5050a3cb6efc6'>".$jobman_shortcode_job->post_title." - Ausschreibung vom:  ".$jobman_shortcode_job->job_field8."</a></div>
            <div id='".$jobman_shortcode_job->ID."' class='accordion-content collapse'> <div class='accordion-inner'>";

thanks for your help!
Gregor