Hi! I understand your Bitrix24 VoIP IVR feature stopped working—that can definitely interrupt your call flow. To help you best, could you share a bit more detail? For example:
- When did the IVR stop working (suddenly, after changes, or gradually)?
- Are inbound calls coming through but IVR options not responding?
- Did you make any recent changes to IVR settings or telephony configuration?
- Are you using Bitrix24's built-in telephony or an external SIP provider?

Meanwhile, I’ll guide you through some initial checks that often resolve common IVR issues in Bitrix24:

1. Check IVR assignment to your phone number:
- Go to CRM > Sales > Sales Channels > Telephony.
- On the connection page, click Configure numbers.
- Verify that your phone number has the correct IVR (voice menu) selected. Sometimes the IVR can get unassigned accidentally.

2. Review IVR configuration:
- Ensure your IVR options (e.g., "Press 1 for Sales") are correctly set, with valid destination extensions or groups.
- Double-check if there are any timeout or invalid input handlers configured to avoid calls dropping unexpectedly.

3. Test inbound numbers:
- Call your Bitrix24 VoIP number and listen for the IVR prompt. Does the IVR greeting play?
- If you hear the prompt but options don't work, there might be a problem with signaling of DTMF (button press recognition).

4. DTMF detection issues:
- WebKit-based browsers on Windows 10 should support this fine, but firewall or router settings can block DTMF signals used by VoIP.
- Make sure your network allows SIP and RTP packets and the firewall isn’t blocking necessary ports.

5. System status and updates:
- Check Bitrix24’s telephony service status in your portal or official site for outages or ongoing maintenance that might impact IVR.
- Confirm your Bitrix24 telephony module is up to date.

If you have already checked these or tell me what you have tried, I can suggest deeper troubleshooting or configurations. Would you like me to guide you step-by-step through the IVR configuration screen in Bitrix24?

Here is the official Bitrix24 IVR configuration guide for your reference: Configure your voice menu (IVR) in Bitrix24.

Let me know how you'd like to proceed!