Salesforce Classic CTI Adapter - Click to Dial

[pminumula]

We set up a CTI Adapter with Salesforce Classic. We created a CTI Flow for click-to-dial.

Our agents click on the phone number to initiate a call.

It takes multiple clicks for the call to initiate, or we have to wait for several seconds (about 15 seconds) to click on the phone number to make a call. Is the click-to-dial wait for all scripts to load before dialing? Is there a way to improve this? It is frustrating for the agents to click on the number multiple times?