Achievement shows in Friend Feed, but not in My Achievements or game page

I have unlocked the "Welcome, friend!" achievement in "Friends vs Friends" game

It shows on my Steam profile, and on TSA it shows in my Friend Feed: AlexCyrlex

However, it doesn't seem to show anywhere else on TSA - not in My Achievements AlexCyrlex's Achievements , not in the game page AlexCyrlex's achievements in Friends vs Friends, not in current achievement streak AlexCyrlex Win Streak - 306 days from 14 Jul 23

This doesn't look like an issue with scan, because TSA knows that I have unlocked this achievement - it shows in Friend Feed. So why doesn't it show anywhere else?

The same happened to another achievement from a different game

Looks like all achievements for new games (those games where I haven't received achievements before) are not processed correctly - they show in Friend Feed, but nowhere else. And the games with previously unlocked achievements work properly - achievements appear on all pages.

And it also looks like other users have reported similar issues, such as in this thread: Post here to request a Full ReScan

Looks like previous achievements are finally unlocked on TSA for me - thanks!

But the issue still exists - when I play a new game and unlock achievements for it, they only show in Friend Feed and nowhere else. For example, this achievement:

What is going on? This issue seems to exist since September 13, there was a post about some changes to scanners on that date. Then there was a post on September 21 (yesterday) saying that the issue was fixed, and while previous achievements were fixed indeed, the same situation repeats for new achievements. Is it some serious bug in scanner implementation? Are there any expectations when it could be fixed? And if fixing this issue is too hard, perhaps it would be better to revert to a previous version of scanner implementation (at least for now) - it may be slower and less stable, but at least it worked?

AlexCyrlex said:Thank you for the feedback.

The scanner changes we necessary as there were some large steam accounts we just couldn't scan at all with the old code.

We'll look into this again today.