Oura recently rolled out a couple of new health-related features to the Ring 3 and later — Cardio Effort and automatic VO2 Max. It also recently rolled out firmware version 2.13.1 for the Ring 4. If you haven’t updated to this firmware version yet, you may want to hold off, as it comes with an annoying bug. For those who already updated, you can rest easy, as there’s a simple way to get around the problem.

Oura has confirmed on its known-issues page (via Gadgets and Wearables) that firmware 2.13.1 is causing some issues with the Ring 4. The company warns that the update can cause the Ring 4 to stop syncing with the Oura app. This bug is apparently triggered “if you switched to a new phone after setting up your ring without completing a factory reset.”