Rust, STM32L451, entering Stop Mode

[rbb]

Hi, I have a problem entering Stop Mode 2 with STM32L451CCU6. My current consumption is around 600 uA, while expected should be much lower. What can cause this problem? Here is the code:

use cortex_m::asm;
use cortex_m_rt::entry;
use stm32l4xx_hal::{prelude::*, pwr};

#[entry]
fn main() -> ! {
    let mut cp = stm32l4xx_hal::pac::CorePeripherals::take().unwrap();
    let mut dp = stm32l4xx_hal::pac::Peripherals::take().unwrap();

    unsafe {
        dp.PWR.cr1.write(|w| w.lpms().bits(0b010));
    }

    let mut rcc = dp.RCC.constrain();
    let mut pwr = dp.PWR.constrain(&mut rcc.apb1r1);
    let mut flash = dp.FLASH.constrain();
    let clocks = rcc.cfgr.sysclk(80.MHz()).freeze(&mut flash.acr, &mut pwr);

    cp.SCB.set_sleepdeep();
    cp.SYST.disable_interrupt();
    asm::dsb();

    loop {
        asm::wfi();
    }
}