No sponsored image appearing in the forth new tab

Description of the issue:
No sponsored image in the forth new tab

**Steps to Reproduce (add as many as necessary):
Open 8 new tabs in brave

Actual Result (gifs and screenshots are welcome!):
No sponsored image appeared below in any new tabs

Expected result:
Sponsored image appear below the forth new tab

Reproduces how often:
Since morning

Operating System and Brave Version(See the About Brave page in the main menu):
Windows 10 (64 bit)
Version 1.21.74 Chromium: 89.0.4389.72 (Official Build) (64-bit)

Additional Information:
I checked that my “Show sponsored images” setting is already turned on.