All issues disappearing from Backlog in Github Project

[MichalMoravik]

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I'm having a big in Github Projects: when going to my Projects Backlog view, sometimes the issues are not there (not loaded), sometimes they appear and then disappear again. I have to keep refreshing the browser tab and with a bit of luck they're displayed for some time until they disappear.

Also, when they are displayed, moving issue (drag&drop) from one column to another will most of the time (circa 90%) cause an error saying:

Unexpected token '<', "<!DOCTYPE "... is not valid JSON

The error is displayed as a toast on the left side. The issue immediately jumps back to the original column (as it was optimistically updated before).

This started maybe 2 days ago, around 4th or 5th March. Is there any known issues?

Thank you team!

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