MC Version : 1.12.2
Forge: 14.23.5.2838
SpongeForge(not necessary for reproduction!): spongeforge-1.12.2-2838-7.1.7

Description:
Place an item frame on the backside of a piston, when the piston retracts, the item frame is broken. If you manually "hit" the item frame to retrieve the item in the same tick(or close, haven't checked) that the item frame is destroyed from the piston, 2 identical items drop out, by using shulker boxes this becomes a very serious issue. It's a little tricky to do it at first but once you get the rhythm right is a duplication machine!

• I tried both with SpongeForge(original discovery) and without.
• It does not happen with vanilla item frames, they behave differently.
• SpongeForge somehow alters the behavior of vanilla item frames, probably to fix the underlying issue(a complete guess on my part), but it does not change the behavior if Quark frames.

Is there a fix for this? My server has the same problem.