The quality and performance of GitHub enterprise has degraded horribly this year. Their problems are self-inflicted and influx is just an excuse.
Despite minimal new features, and drastically increasing hardware resources to keep up, self-hosted GitHub enterprise went from things being instant to most requests taking many seconds. And activity on issues in one repository tends to mysteriously re-open issues with the same number in other repositories.
I think they are vibe coding and facing the consequences.