Reports arise that Apple Watch Series 7 fails to render app icons for some apps. Issue might be related with icons being rendered in the wrong size. Also, some complications are rendered incorrectly.
Biggest problem here is that issue is NOT reproduced on Apple Watch Series 7 simulator.
Twitter thread provides more details.
Reference: Apple Watch Series 7 owners hit with blank app icon problem
Recommendations
Developer:
Check apps on devices. Use pre-rendered icons.QA engineer:
Check existing apps on Apple Watch Series 7.PM/DM:
Plan hotfix release, if affected.