When using the APIs https://www.elastic.co/guide/en/kibana/current/edit-parameter-by-id-api.html to update the global params of synthetics, the public locations get the update "automatically".

For private locations, it is instead necessary to trigger the following API in order to take those params into account in their respective policies:

GET kbn:/s/<space id>/internal/synthetics/sync_global_params

Some ideas:

• We force the sync on each API which involves global parameter update
• We add a parameter to force the sync on each API which involves global parameter update
• We document this behavior in each page of the API, but it's odd as the sync_global_params is an internal API