Power KPI 1.5.0 has been significaly refactored and redesigned in terms of TypeScript and CSS code.
If you are facing any issues we would recommend to clear browser cache and Power BI Desktop cache.
Power BI Desktop cache can be cleared by removing everything at these folders:
Browser cache can be cleared by pressing Ctrl + Shift + Delete and selecting "Cached data and files". The final step is to click "Clear" button.
Microsoft Power BI Custom Visuals