- Internet connection too slow (test on fast.com)
- Saturated Wi-Fi: switch to Ethernet or 5 GHz Wi-Fi
- ISP DNS blocks the streams: use 1.1.1.1 or 8.8.8.8
- Unstable IPTV provider: demand a free trial
- App not updated
- Misconfigured VPN
- TV box too old (RAM full)
- Firestick overheating (use a ventilated OTG cable)