If you lose FPV, I bet you also lose telemetry data with "Phantom connection broken" message.
I would AVOID using IOC Home Lock when dropping FPV. I had experienced multiple times HL failed when doing 2km+ range testing with P2V (non-Plus) back to late 2013. The problem/risk of HL at 2km+ is when you switch S2 to HL, sometime the 5.8G receiver could not receive such HL command and stay as IOC off but you thought it's HL. When FPV dropped at distance and you don't know aircraft orientation, pulling back with faked HL (in fact IOC off) may fly your aircraft somewhere further.
I always use/initial RTH (8-10 seconds later) to ensure aircraft heading back, then I can switch S1 to GPS mode and fly full speed forward heading back home until regaining FPV. I would also check last known battery level. If battery is running low, I would fly in ATTI mode for faster speed, but this is more risky without FPV.