My received line disappeared a day or two ago. I just noticed yesterday.
There seem to be differing opinions on this...
A) it's nothing (e.g. mysterious system glitch)
B) it's something good (e.g. file officially transferred to local office, some approval met (e.g. background checks), or next step is coming soon
C) it's something bad (e.g RQ is inbound)
D) all of the above.