Page reload necessary to block ads on specific site

[ghost]

Filter issues MUST NOT be reported here. Read first: https://github.com/gorhill/uBlock/blob/master/CONTRIBUTING.md

Describe the issue

Not all ads on 9to5mac.com are blocked when loading the page. Only a manual reload of the page will block those ads.

One or more specific URLs where the issue occurs

https://9to5mac.com

Screenshot in which the issue can be seen

Steps for anyone to reproduce the issue

1. Open Safari and go to the URL
2. Scroll down to see the ad
3. Refresh the site and the ads will be gone

Your settings

[If you fail to provide this info, I will mark the issue as invalid. Lists all settings which differs from default settings]

• MacOS version: 10.13.3
• Safari version: 11.0.3
• uBlock Origin version: 1.14.24

Your filter lists

Your custom filters (if any)