Active call issues with Yealink hardphones

[bsanders]

I imagine this to happen on any Yealink phone but we primarily use T46G.

While on a call using a Yealink T46G DSSkeys #6 and above are available to use and "interfere" with the current call.

Examples:
1. Press any DSS presence buttons (*30, *31, *32) will change the callee's presence (not caller) and the call is disconnected. 3CX Bug?
2. Press any speed dials will send callee to speed dial.

Is there anyway to "hide or disable" the DSSkey functions on Yealink while on call? Or does anyone have any workarounds to prevent this?

3CX v12 SP6.1
T46G FW v28.71.0.224

thanks.