1.9.4 block capture problem with Tinker's Construct and Forestry

I threw TC explosives to the ground and got some normal drops.
But terrain have no change. Meanwhile the server spams for a time(see picture).

This also happens to many automation block change functions of Forestry mod. Such as the auto farm. But bees can plant flower normaly with this issue popup, not a spam.

Versions:
minecraft server.1.9.4
forge 1.9.4 12.17.0.1976
spongeforge 1.9.4 1968-5.0.0-BETA-1503

And see also. Maybe same problem:

:smiley: Thanks
And Iā€™m working hard on my Englishā€¦

hope the problem could be solved soon.