Manually turn the watch off and back on to clear out residual temporary cache files.
The HK8 Pro Max is a hardware-centric device; what you buy is generally what you get. Firmware updates for this model are sparse, unverified, and risky to install manually. Hk8 Pro Max Firmware Update
This comprehensive guide covers everything you need to know about updating your HK8 Pro Max smart watch safely. Why You Should Update Your Firmware Manually turn the watch off and back on