Cannot see output from tokio::tracing

Guys, the following code only prints tracing if tracing::error! is used. Other levels do NOT show any output. RUST_LOG env is set to trace.
What to do in order for the tracing to be enable on every level, that is trace, info etc.

use tracing::instrument;
fn main() {
        trace_me(1, 2);

fn trace_me(a: u32, b: u32) -> u32 {
    tracing::warn! {//ONLY ERROR level gets printed
            "failed to parse command from frame"
    a + b