Signal from rust only works the first time

[rurigk]

rinf 8.7.2

Im having a problem i have a rust signal that only works the first time a message is sent

// [RUST-SIGNAL]
#[derive(Debug, Serialize, RustSignal)]
pub struct HostListUpdate {
    pub hosts: Vec<String>,
}

StreamBuilder(
  stream: HostListUpdate.rustSignalStream,
  builder: (context, snapshot) {
    final rustSignal = snapshot.data;
    print(rustSignal);

    return Placeholder();
  },
)

When i sent the signal the first time (vec contains 1 element) i receive a null and then after that the HostListUpdate data but following messages i only get a null with no HostListUpdate data

null
Instance of 'RustSignalPack<HostListUpdate>'

This is the only signal that sends a null
My other signals only send the signal data

[temeddix]

Hi :)

This is the default behavior of StreamBuilder. When a StreamBuilder is first created, it needs to fill its inside with something, even if it hasn't received something from the stream yet. Therefore, snapshot.data is always null on the first creation.

[rurigk]

I ended up using HostListUpdate.rustSignalStream.listen instead of StreamBuilder but still is weird that it works the first time but subsequent messages get lost

I'm probably not understanding flutter/dart enough