Chiseled blocks (at least cobblestone) are broken instanly with any tool (including empty hand). When broken with empty hand, there is a chance of them not dropping item (i.e. disappearing completely).

Chisel 0.0.2.6
Forge 11.15.0.1699

Updated title to include layman terms :P

I'm working on a fix for this though, almost done. Soon.

@tterrag1098 i know you mean soonTM

Soon™

636916c at least partially addresses this issue. All blocks will by default have a hardness of 1.

just waiting to you order jenkins to build the jar

1.8.9 version Fix ???

Use 1.9 or 1.10

IronBackpacks is definitely available for 1.10.

Really where ?

On Curse?

i play in 1.8.9 because some mod have no 1.9 update --'

Feel free to dump that mod then. It's just one mod. You can live without just that one, trust me ;)

You think i can convert the 1.8 in 1.8.9

I don't understand what you are saying, could you please rephrase?

What mod is so important that it prevents you from playing 1.9/1.10?

Sorry i m french
There are Mrcrayfish ,decocraft, ironbackpacks

i try tu use the 1.8 version but there are bug

Is this going to be included in a build for 1.8.9? Latest one seems to be from mid Jan.

It already was, I believe. Just not posted to CurseForge. Either way, all development going forward will be on 1.9.

Wow, that was a quick comment, thanks. Yes, it is in the #7 build on the Jenkins link.
If it were me, I'd want to release that (barring a reason not to) so that folks who prefer the N-1 release would have it, but up to your team how to handle it of course. :)
I only did a quick test, On the surface it (0.0.2.7) worked ok in the context of FTB unstable 1.8.9.

There is a good reason, about half the blocks have no model