Firebase Flutter StreamBuilder when dismiss the list from listview the Screen is lagging a bit

The link is my situation in .mp4 for 3 secs the lagging screen. I found my screen shows some lagging situation after I dismiss the listview and update the doc.

This is my dismissible widget.

Dismissible(
                          direction: DismissDirection.endToStart,
                          background: Container(
                            color: Colors.red,
                          ),
                          onDismissed: (DismissDirection direction) {
                            setState(
                              () {
                                healthGoal.removeAt(index);
                                healthgoalCollection
                                    .doc("c66ae3ef-9853-4")
                                    .update(
                                  {
                                    "healthGoalList": healthGoal,
                                  },
                                );
                              },
                            );
                          },

Here is my stream builder widget that I get the data from

StreamBuilder<DocumentSnapshot>(
      stream: _healthGoalStream,
      builder: (context, AsyncSnapshot<DocumentSnapshot> snapshot) {
        if (!snapshot.hasData) {
          return const Text("No data");
        }
        if (snapshot.hasError) {
          return const Center(child: Text('Something went wrong'));
        }

        if (snapshot.connectionState == ConnectionState.waiting) {
          return const Center(
            child: CircularProgressIndicator(
              color: Colors.red,
            ),
          );
        }

        if (snapshot.connectionState == ConnectionState.active) {
          Map<String, dynamic> condition =
              snapshot.data?.data() as Map<String, dynamic>;

          Map<String, dynamic> conditionmap =
              Map<String, dynamic>.from(condition);
          healthGoal.clear();
          conditionmap.forEach(
            (key, value) {
              if (key == "healthGoalList") {
                healthGoal = value;
              }
              if (key == "nameUpdated") {
                if (value != "") {
                  nameupdate = value;
                }
              }
              if (key == "agreeToGoal") {
                if (value != "") {
                  agreeToGoal = value;
                }
              }

              if (key == "dateTimeUpdated") {
                if (value != "") {
                  timeget = DateTime.fromMillisecondsSinceEpoch(value);
                  timeupdate = f.format(timeget);
                }
              }
            },
          );

Are there any ways that can prevent this kind of lagging situation? Thanks if you can help or even give me a direction on the cause.

This is my cloud firestore data looks like