Joystick Input Affects Display When GPS Off

[Xlio5]

Describe the bug

When using the Lua telemetry script to connect to INAV, unexpected behavior occurs in the displayed values when no GPS is connected. The numerical values on the display become unstable and appear to be influenced by joystick movements

• Numeric values fluctuate erratically with joystick input
• Values show impossible/improbable numbers during stick movements

To reproduce

1. Set up INAV without GPS connection
2. Load telemetry script on transmitter
3. Observe any numeric display field (altitude, distance)
4. Move joysticks while monitoring displayed values

Expected behavior

Displayed values should remain stable

Screenshots

Radio and model settings

TX = RadioMaster TX16S EdgeTX ver = 2.11.0 Telemetry Protocol = Crossfire Telemetry TX ver = 3.5.0 Telemetry RX ver = 3.5.1 FC Firmware = iNAV 8.0.1

Additional context

QUAD-2000-07-15-233910.csv

Proposed Solutions: Add null-check guard for status before displaying position-related values

[stronnag]

Proposed Solutions: Add null-check guard for status before displaying position-related values

Pull requests are welcome.