Ignore 0 -> 1 mucus shift

lib/sympto/mucus.js

@@ -1,4 +1,5 @@
 export default function (cycleDays, tempEvalEndIndex) {
+  const notDetected = { detected: false}
   const mucusDays = cycleDays.filter(day => day.mucus && !day.mucus.exclude)
   let currentBestQuality = 0
 
@@ -9,6 +10,9 @@ export default function (cycleDays, tempEvalEndIndex) {
       currentBestQuality = day.mucus.value
     }
 
+    // if mucus only changes from dry to nothing, it doesn't constitute a shift
+    if (currentBestQuality < 2) continue
+
     if (day.mucus.value !== currentBestQuality) continue
 
     // the three following days must be of lower quality
@@ -40,6 +44,6 @@ export default function (cycleDays, tempEvalEndIndex) {
     }
   }
 
-  return { detected: false }
+  return notDetected
 }