Limitations

Area	Limitation
Twilio call rate	1 call per second per account by default. Predictive with 30 agents needs about 0.7 per second at steady state plus bursts, and agent-first uses two calls per dial. Ask Twilio to raise the limit, and tell us the new value, before load testing (Setup).
The browser is on the critical path	Auto-accept and auto wrap-up run in the front end. With the Flex tab closed, the agent is effectively unavailable to the dialer.
Agent-first in Flex	On an agent-first call, Flex does not show the participant list or the hold button.
Calibration	Pacing estimates and AMD thresholds start from simulator priors and are refined from real traffic. AMD thresholds are not yet calibrated for Israeli carriers.
Messaging	The Bulk Messaging API is a public beta; WhatsApp to SMS fallback has not been tried on a live account (caveats).
Legal rules	DNC, registry and consent rules reflect a reading of Israeli regulation and must be confirmed legally before going live.
Not built yet	Preview mode for regular leads, agentless calls and voicemail drop, CRM adapters, built-in dialer reports and export, a manual override of the pacer margin, SMS callback reminders.

For custom reporting on the dialer's data, see Your own BI tools.