Credit: Jimmy Westenberg / Android AuthorityTL;DRInstead of improving performance, the One UI 8 Watch update is apparently breaking core Galaxy Watch 4 Classic features for some users.Wrist detection stops working, which disables health features like ECG and body composition.Reports suggest Samsung has paused the rollout, and a fix may be coming.If you have a Galaxy Watch 4 Classic, you might want to wait before updating to One UI 8 Watch. What was supposed to be a fresh lease on life for Samsung’s 2021 fan-favorite smartwatch is causing problems for some users.The One UI 8 Watch update, built on Wear OS 6, began rolling out to Galaxy Watch 4 models in early December. However, instead of making the watch better, users say the update is causing the sensors to stop working.