Tooltip in scheduler for mobile devices (ios)

Hello

I noticed that the tooltips in the scheduler, used with the timeline extension, does not work with mobile devices.
On desktop browsers the tooltips show/hide as expected.
Unfortunately I did not find any solution yet.

Tried to true/false the config setting:
scheduler.config.touch_tooltip = true; //dis-/enables tooltips
without success.

I am using scheduler version 4.4.9.

Is there a workaround or a simple solution for the matter?

Thanks + regards.

QTX