Why are handled exceptions being reported as issues?

[argenkiwi]

We are using Sentry in our Android app. The app is written in Kotlin and makes use of the arrow.kt library to handle errors (among other things). However, those errors are spamming the issues list for the app on Sentry. My understanding is that handled errors should not be reported as issues automatically. Because they are, I seem to be exceeding the quotas for my project too soon. Does anyone know where the issue could be coming from?

Here is an example of how errors are handled in our app:

val foo = ...
either {
    ensureNotNull(foo) {
        NullPointerException("Foo not set.")           
    }
}.fold({ ... }) { ... }