lightsleep(n) returns immediately on pico-w or pico with network imported #17204

Port, board and/or hardware

pico and pico-w

MicroPython version

MicroPython v1.25.0 on 2025-04-15; Raspberry Pi Pico W with RP2040

Reproduction

copy paste this code:

# light_sleep_test.py
from machine import lightsleep
from time import sleep_ms, ticks_ms, ticks_diff

def test(n):
    for i in range(n):
        t0 = ticks_ms()
        sleep_ms(50)
        lightsleep(5000)
        sleep_ms(50)
        print(i, ticks_diff(ticks_ms(), t0))

test(10)

Expected behaviour

If the test works it should print
0 5101
1 5101
2 5101
3 5101
4 5101
5 5101
6 5101
7 5100
8 5101
9 5100

Observed behaviour

Instead it prints:
0 142
1 127
2 127
3 128
4 129
5 127
6 128
7 128
8 128
9 128

Additional Information

See discussion here

Code of Conduct

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