Platforms not selected from host on Cycle > 1

[wxtim]

Describe the bug
Running a workflow such as

[scheduler]
    UTC mode = true

[scheduling]
    initial cycle point = 2013
    final cycle point = 2015
    [[graph]]
        P1Y = my_task

[runtime]
    [[my_task]]
        script = echo "HOSTNAME: ${HOSTNAME}"
        # platform = testplat
        [[[remote]]]
            host = testplat

Only Cycle 1 runs correctly on testplat, subsequent cycles run my_task on localhost.

Where global.cylc

[platforms]
    [[testplat]]
        hosts = testplat
        ssh command = ssh -oBatchMode=yes -oConnectTimeout=10 -q
        retrieve job logs = true

Expected behavior
Each cycle should run on the same remote platform.

Pull requests welcome!
This is an Open Source project - please consider contributing a bug fix
yourself (please read CONTRIBUTING.md before starting any work though).

[oliver-sanders]

Could you add your global configuration for the testplat platform.