Polar has announced an upcoming maintenance window. Below is what they announced:
"We'd like to let you know that on Wednesday 23rd of September 2026 at 05:00 UTC we will have a scheduled maintenance break in all Polar services. We're expecting a downtime of up to 3 hours for "under-the-hood" improvements, after which it will take a few hours for the services to be up and running at full speed. To track the progress of the maintenance break, head over to https://status.polar.com/. "