Uncaught TypeError: Cannot set property '_cacheId' of undefined
at NewClass.addMarker (application-ec9f73ad8f9371934c4cb48b956e09eb5f61b1ffbe1e9bce4d08874c2130c3a5.js:59680)
at NewClass.updateMarkers (application-ec9f73ad8f9371934c4cb48b956e09eb5f61b1ffbe1e9bce4d08874c2130c3a5.js:59680)
at application-ec9f73ad8f9371934c4cb48b956e09eb5f61b1ffbe1e9bce4d08874c2130c3a5.js:59680
at XMLHttpRequest.request.onreadystatechange (application-ec9f73ad8f9371934c4cb48b956e09eb5f61b1ffbe1e9bce4d08874c2130c3a5.js:59680)
Following where that error in the code, I think it is referring to a marker cache, which possibly is something to do with what is removed in 2015906552a49de3fe715d20e3c94ea3d9d72b06.