When I use the grinder of ActuallyAdditions, I use importer to get the product. It work very will at the beginning, but after I played some day, it wouldn't work sometimes. I try to change the frequency and priory, but still not working. Then I change the Item Transfer Rate to 1, 63 or 65, and it will work so fast. When I change it to -1, it do something awesome:
the Grinder

the chest

And they can be taken out in hand.
Then I tried the grinder of enderIO, and it won't happen. Is that IT's problem or AA's problem?

version:

• ActuallyAdditions-1.10.2-r105

• CommonCapabilities-1.10.2-1.3.4

• CyclopsCore-1.9.4-0.10.9

• IntegratedDynamics-1.10.2-0.7.13

• IntegratedTunnels-1.10.2-1.2.5

• Forge 12.18.3.2488

Yeah, you shouldn't be able to change the rate to anything negative, this can result in unexpected behaviour in other mods.

maybe you can add a limit?

Yes, that will be the best way to fix it.