I had never heard of CoinStats before. I fully understand your point above, the problem you are facing indicates that CoinStats cannot be fully relied upon to track real-time prices due to several constraints that occur as you experience.
Many issues are triggered due to late warnings, technical issues are inevitable with events like this. When the warning for a coin that you expected never appears, you should look directly at sites that serve real-time price movements such as coingecko.com.