For this particular configuration, the inserter won't completely go back to normal when waiting to pick something up and will instead be angled a bit
http://imgur.com/a/xs0j0
[0.15.4-5] Inserter picking from a splitter
Re: [0.15.4-5] Inserter picking from a splitter
Thanks for the report. It should be fixed for the next version of 0.15.
If you want to get ahold of me I'm almost always on Discord.