Why don't items expire in my Micronaut/Redis cache?

I have a Micronaut cache in Redis configured like this:

redis:  uri: ${REDIS_URL:`redis://localhost`}  caches:    kyc-fenergo-service-token:      expire-after-write: 14m

I have a method annotated like this: @Cacheable(value = "kyc-fenergo-service-token")

After the first call, the value is cached as expected, but it never expires. Any idea why this is the case?