Not sure if this is a bug or not but thought I would report because I did not expect this at all.
The fast inserter taking from the underground is unable to get any plates, but the one taking from the belt can easily grab them all.
[2.0.77] Inserter can grab from belt but not underground belt
Re: [2.0.77] Inserter can grab from belt but not underground belt
Thanks for the report however this is working correctly. The item(s) move into the underground portion of the belt before the other inserter is able to grab them.
If you want to get ahold of me I'm almost always on Discord.

