Telegram.org is showing Ads

Description of the issue:
Ads are showing in channels on telegram web. The frequency of ads maybe random. Not all the time ads show up but on public channels with larger subscribers it is most likely.

Exact URL of the website in question:
https://web.telegram.org/a
https://web.telegram.org/k
channels below might be more likely to show an ad at bottom
https://t.me/washingtonpost
https://t.me/wallet_news
https://t.me/tradingview

Screenshot of the ad as it appears in Brave:


image
image

Did the issue present with default Shields settings? (yes/no)
Yes, default shields cannot block it.

Does the site function as expected when Shields are turned off?
No, The ads still show when Shield are down.
The ads still show when shields are set to Aggressively block trackers & ads and Block trackers & ads.

Does the ad appear when using a Private window as well? (yes/no)
yes, ads appear randomly on channels. To use telegram you need to sign in though.

What OS are you using when you see the ad?
macOS

Brave version (check About Brave):
Version 1.67.123 Chromium: 126.0.6478.126 (Official Build) (x86_64)