Liionpack always shut down the experiment due to "High voltage limited"

[Yang-Qirui]

I want to build an experiment like:

experiment = pybamm.Experiment(
        [
            (
                 "Discharge at 5 A for 1000 s or until 3.3 V",
                 "Rest for 1000 s",
                 "Charge at 5 A for 1000 s or until 4.1 V",
                 "Rest for 1000 s",
             )
        ]
        * 1000,
        period="10 s"
    )

my upper cut-off voltage is 4.2 V and lower cut-off voltage is 2.5 V. However, the liionpack always mentions "High voltage limited" and shut down my experiments. It's confusing. I try to replace the experiment above with:

experiment = pybamm.Experiment(
        [
            (
                 "Discharge at 5 A until 3.3 V",
                 "Rest for 1000 s",
                 "Charge at 5 A until 4.1 V",
                 "Rest for 1000 s",
             )
        ]
        * 1000,
        period="10 s"
    )

However, the liionpack also not allow a stage without specified executing time. I don't know how to fix those problems.
Any help will be appreciated!