Following a faulty DNSSEC rotation out of our control, our customers may experience difficulties in resolving records on exoscale.com zone.

Flushing exoscale.com zone from your resolver or the ones of your ISP will help in resolving the situation quicker than waiting for the TTL to expire.

Also, in the meantime you can use public DNS such as Quad Nine 9.9.9.9 https://quad9.net/ as a temporary workaround to the current issue.