This is a known fault but has not been addressed.
Ongoing Error in Player profile

That's been an issue for some time now but with all the other bugs the developers need to fix, I suppose it must be low priority?

Seems so. Causes issues for my invite process. API all round tends to be a much lower priority.
However, the bug volume is a problem that C.C has created themselves.

I've been criticising this site for poor management and inadequate quality control for some years now and I'm not that bothered by who I may offend. The staff have probably got my number by now but in one topic in Admins Training... (I think it was) earlier this year, I can remember a guy running to the defence of the site.
He obviously thought I was out of line but I responded by posting a list of all the bugs and problems I've encountered over the years. Remember the problem with the '502 Errors' that was attributed to a recruitment drive launched by the site but apparently without any consideration of the extra server capacity required for a sudden rush of new members?
I'm guessing he's gone very quiet now since the club redesign? 😉
https://api.chess.com/pub/player/{username}
last logon date incorrectly shown for random user names. Unable to see any pattern.
examples:
https://www.chess.com/member/thrain31 TODAY API 24/08/2023 13:53:00
https://www.chess.com/member/joshcad 06/09/23 API 23/08/2023 12:26:00
https://www.chess.com/member/robertson80 07/09/23 API 28/08/2023 09:17:00
https://www.chess.com/member/jdelej TODAY API 20/08/2023 23:32:00