Achievements are hidden in a separate window and are not so noticeable. The problem is big and not a priority. If there is something from the main functionality concerning the main task of the client, then it is better not to be distracted by these cosmetic trifles!
Maybe then it's better to turn them off. The functionality that does not work is like a red rag for a bull - extra nervousness and an incentive to senseless action. At least this way the problem will be solved in terms of complaints.
Personally, this problem with achievements annoys me much less than those drops in the global games statistics graph during the 2vs2 matchmaker tests.
That's where it would definitely be worth doing something...
delete the data for a couple of weeks while the test lasted and everything was not corrected
, or somehow try to transfer the data to the desired schedule...