Thank you once again @sofy

Please navigate to Dashboard > Forums > Dashboard admin page, click on "Delete all caches" button. If you've installed some cache plugins please delete those plugins caches as well. Then press CTRL+F5 (twice) on the frontend. 

Hi Sofy. Here it is.

Could you please leave a screenshot that shows the final look of the code in your case? 

Sorry for the late reply. Unfortunately, it's the same for me, even after applying yor fix.

I even tried to edit the original file, just to test it, but it's the same even then.

If you're using the wpForo 1.6.2 version, please follow the steps below:

1. Copy wp-content/plugins/wpforo/wpf-themes/classic/layouts/1/forum.php file 

2. Paste it in your active theme's wpforo folder, as explained in this doc: https://wpforo.com/docs/root/forum-themes/theme-customization/

3. In copied file go to line 30

4. Remove just the type, part of the code from that line.

5. Finally, it should look as shown in the screenshot below. 

I may suggest another solution you can use. Just change the value for the "Extended Layout - Number of Recent topics" option and set it e.g. 7. 

More info in this doc: https://wpforo.com/docs/root/categories-and-forums/forum-layouts/extended-layout/

Let's say I have three sticky threads in the subforum, it will display all of them in the recent section on top of others, no matter how far ago was the last post in them.

Is there a way to display a REAL list of recent topics in recent section?