First, to clarify what I mean, I'm talking about these things on the list of platforms.
I've found two scenarios where this occurs. For both, let's assume a platform starts from Vulcanus.
1. I want to got to Nauvis, but I accidentally click the ▶ button for Gleba instead, and then click the ▶ button for Nauvis while in transit. The indicator will stay Vulcanus → Gleba until I arrive at Nauvis or exit and reopen Remote View.
2. The platform leaves for Fulgora, this route takes it past Nauvis, so the indicator will initially show Vulcanus → Nauvis. If I'm still watching in remote view when it passes Nauvis, the indicator will remain that way. Again it will update only once the platform reaches Fulgora, or when I exit and reopen Remote View.
They update when a platform starts or stops, or when remote view is first opened, but while it remains open they can show outdated information.