DTMF tones, no longer work

[Fedge1]

Hello. I don't think this is a Manjaro issue, as I have the same issue on SXMO on Arch. If someone could help point me to a better place to bring up the issue, that would be swell.

Anyways, from day one with my PinePhone Pro, the DTMF tones worked fine. But a couple of weeks ago, they stopped working (at least with Manjaro Plasma and Arch SXMO). Is it an Arch issue?

I haven't been able to find anyone else posting a similar problem with DTMFs (recently). Which seems odd to me, because my main use for the tones are to check voice mail. And I would assume many others would be trying to do the same??