Durable object resets value on each request to Worker

[[durable_objects.bindings]]
name = "COUNTERS"
class_name = "UserIdCounter"

[[migrations]]
tag = "v1"
new_classes = ["UserIdCounter"]

export class UserIdCounter extends DurableObject {
    async increment(amount = 1) {
        let value = (await this.ctx.storage.get("value")) || 0;
        value += amount;
        await this.ctx.storage.put("value", value);
        return value;
    }
}

export default {
    fetch: router.handle // my worker logic
}

const counterStub = env.COUNTERS.get(env.COUNTERS.idFromName('website'));
await counterStub.increment();