Yes I see the same thing. It randomly comes back with latest being blank but I've seen that before once in a while even when there were not issues. /usr/bin/tumbleweed just uses curl to download https://download.opensuse.org/history/latest but if it fails it fails silently "latest" still contains 20220525 despite 20220526 and 20220527 being released. Looking at https://download.opensuse.org/tumbleweed/iso/ there are no ISO files for anything later than 20220525. I suspect that they either ran out of disk space or have a server hw problem. I sent an email to the admin but have not received a response. Also, today I received and email saying that messages from my factory list subscription were bouncing so my subscription was disabled, yet, the email saying that they were bouncing had no problem being received. I wonder if the holiday is causing the delay in response and resolving the issue?