Random errors

[Falstaff]

I'll drop in 100 pages and it seems that every 5th or 7th page will error. If I redrop the page it will RIP.
Does the same with Impos, If I drop 24 flats at once I'll get a weird size is too small error or something on at least a couple of flats, but if I redrop it it will RIP.

WTF?