By default, the module will check the iKVM availability via javascript. If IPMI does not supports remote KVM, the button on the client area will be removed. Therefore, the KVM button will be available for a short time during the availability check.
This behavior can be adjusted via the module settings page, option "Legacy KVM Link", please see: Client Area Settings

However, there may are situations in which no check is desired at all. For example, Dell iDRAC has a limit on concurrent sessions. If the customer reloads the page often, this limit could be reached.
Enabling this option completely disables the KVM availability check.

Important: The option "Legacy KVM Link" must be disabled (default setting), otherwise the option has no effect.

How to disable the KVM availability checks

The feature can be activated via the customconfig.php file, which is located at /modules/servers/dedicated/