Modpack:

FTB Evolution 1.3.0

Issue:

Upon restarting a world, the cobblegen stops generating resources and must be reset by replacing either the water or lava.

Before World Restart:

After world restart:

More info:

This interaction took place in a void dimension from the Just Another Void Dimension mod. Have not tested in the overworld, etc. May be an issue with another mod in the pack.

This appears to no longer be happening for now, despite not changing anything.. Not sure what was causing that to happen.

it happens if you use a fluid container and it runs out, so I still need to implement a regular check to see if there's valid blocks next to it instead of only reacting to block changes

It happens when the fluids are simply placed in the world, sans containers. The simplest setup to check is a stone generator, lava on one side, water on the other, catalyst block (ie. double-compressed stone in the Newstone Hollow pack) below. Verify that the generator creates stone, then restart the world. The generator will no longer work until it receives a block update.

Unfortunately, this issue makes the mod unplayable. It just isn't feasible (or fun) to travel to every generator in a world to update it after every restart. Were you able to make the change you proposed?

putting up a new version to address this
the gens will now check every 5 seconds for valid configurations when it has no recipe