No red message badge when I ping the role

I have noticed that my server don't display the red message badge for people, who are offline at the time of a ping, when I ping a role.
Practically it behaves as if I pinged with `@here` , it only pings people who are online at the time of a role ping.

I'm a server owner of a crypto protocol and we do not allow double account and scammers, that's why we have nearly same amount of banned accounts as legit accounts on server, around 13k.
Also we have robust security system. We even had a security audit of our discord server., that's why we have so called “cold admin acc” as an server owner, who is on a dedicated laptop for solely purpose to manage server and bots. For all other thing like interaction with the community we do with “hot accounts”.

I have contacted the discord support via email back in January. this was their last response:
“Thanks for sharing this report! Just to give you a heads up, this issue is known and on our team's radar. We are currently investigating this further and working on a fix. You can learn more information here: [LINK IF AVAILABLE] *Note: Our support team does not have an exact ETA for when a solution will be available, and we won't be able to provide any status updates on this specific bug.* I'm so sorry that we don't have an immediate solution for you, but if you have any other questions related to our app in the meantime, please let me know here. Best, Pineapplefarmer”