IVR selections not being recognized

All of a sudden within the last 2 months I’m starting to have more and more customers complain that their IVR will not respond to a choice. It seems to come and go with no relation to asterisk version. In the past this has always worked. Am I missing a variable change on the backend that happened recently? When I find the call in the asterisk logfiles sure enough there is no dtmf showing up.

How are you trunking your incoming calls? If there’s a way for you to replicate the issue you may want to setup call recording and see if you can hear the key presses on the call.

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I have dtmfmode=auto

Recording the call is a good idea

Do you have DTMF logging enabled?