I am just going to lay out my thoughts about this issue, so comment might be a bit all over the place:

Important point

- issue isn't reproducible 100% of the time. Sometimes key presses (DTMF codes) work normally

Next steps
- find a customer for which key presses don't work.
- call them using all possible apps ( Mobile app, Desktop app, Web app)
- call them using a deskphone if you have one
- see if issue is reproducible on all platforms

Next steps2
- on your keyboard try pressing the keys(1 for sales etc.) with the numbers above the letters
- on the right side of your keyboard try pressing the keys using the numbers of the number pad
- on the apps try clicking with the mouse on the dial pad to press the keys
- if only the num pad on the keyboard isn't working try pressing the "Num Lock Key"

Important point2
while you are testing write down all of the information you are gathering + date&time in case you need to raise this to support.

Thanks for the input. This is 100% reproducible all of the time. If any company we call has a phone tree system - we cant get though it as it does not recognize when we use the dial pad to make a selection. I used some of your advise above, tried using the keypad and the number keys to navigate though a phone tree - it did not work. The keypad and number keys just transferred me to internal extensions instead of being registered by the outgoing call as menu selections.

You need to speak to RC support and provide them with call samples. It seems like a deeper underlying issue, that needs to get fixed on the backend.

-The keypad and number keys just transferred me to internal extensions instead of being registered by the outgoing call as menu selections.
(That's one of the reasons why you should be using 3 or 4 digit extension numbers.) I find it surprising that the keypresses connected you to an internal extension. I was not able to reproduce this on my end.
When I called an IVR menu and tried to dial an internal extension I got an "you have dialed an invalid selection" followed by the IVR prompt again.

There isn't a setting you can tweak in order to change this behavior, so reach out to RC Support.

Any updates on this?  I have the same issue, and it is not the numbers I am calling - when I use my cell phone to call it works just fine.

Same here, happening at our company as well.