There was a problem with our CDN provider (Bunny) https://status.bunny.net/incidents/zggwc6h7tcdt that cause media files failing to load for about 20 minutes. The issue has now been solved and all is back to normal.
There was a network issue https://network.status-ovhcloud.com/incidents/qgb1ynp8x0c4 in the data centers infrastructure used by Masto.host and it caused about 15 minutes of downtime at 13:25 GMT. Everything is back to normal.