My xbox series x/s achievements are showing up as xbox one achievements on xbox.com ?

I have this same issue on my Xbox Series X, achievements pop and show up however in the dashboard it shows 'There are no achievements available for this game' likewise on the Xbox app on my phone it shows none available.

Achievements unlocked while playing on a series S/X aren't separate,they're just the same as xbox one achievements.

It's not like the xbox 360 & xbox one where the achievement system was made slightly different,the xbox one & series consoles use the same achievement system.

Oddly enough, a few minutes ago I logged into my account on Xbox.com via my PC, and everything shows up just fine. But on my series X? No dice. Last time this happened, the achievements showed up as 0/0 on both Xbox.com and my console.

Still can't see my all achievements on Xbox one or the Xbox app for Android or Xbox.com. The only achievements I can see are recently played games, but none of my old 360 or One games show up on the list. . I can view my achievements fine on the true achievements
app for Xbox one. I have to boot up an old game for the achievements of that game to show back up. I can view my Xbox 360 achievements on the 360 emulator also.

Seems this bug also only affects Xbox One/Series X/S games. Been playing some Xbox 360 games on back compat and they show achievements just fine after hours of play.