Fongo app is slow to respond at times.

[BAL]

Hi, I have Fongo with an iPhone 6. I have notice that the app seems to freeze for a moment during a call. For instance, I want to use the speaker phone quite often. But when a call is coming (in normal mode) and I try quickly to activate the speaker phone, I have to tap several times on the icon of speaker phone before it engages. The same thing when I want to cut the call, I have to tap few times for the line to close, regardless of the force use to do it.

Everything works as it is supposed to work except the response time of the application. Am I the only one who's experiencing this problem? Thanks.

[BAL]

I forgot to say that I use a screen protector, that works perfectly with other applications. And like I said, the problem exists regardless how force use to tap on icons.