Consider a Minecraft world with a behavior pack that contains the following server script:

const system = server.registerSystem(0, 0);

system.initialize = () => {
    system.listenForEvent("minecraft:block_interacted_with", event => {
        let eventData = this.createEventData("minecraft:display_chat_event");
        eventData.data.message = "Block interacted with";
        this.broadcastEvent("minecraft:display_chat_event", eventData);
    });
}

What it does is send a chat message everytime the minecraft:block_interacted_with event is fired. Before 1.16.0, this script would send a chat message everytime the player used a Fire charge and a Flint and steel. After the update, this no longer works.

This event still works for other things like opening and closing fence gates, however the event is no longer fired when a player uses a Fire charge or Flint and steel.