Blocks from different mods got messed up after crash

[itsdummybot]

While I was flying on elytras Minecraft got crashed with that error

java.lang.NullPointerException: Exception while updating neighbours
java.lang.NullPointerException: null
	at li.cil.oc.common.tileentity.Capacitor.recomputeCapacity(Capacitor.scala:58)

(full log here)

After reconnecting every (not every, carpeted capacitors are still carpeted capacitors) block from different mods (vanilla blocks were not affected) got messed up: from iron chests to some shulkers, cables from simple storage network to shulkers, cables from OC to computer cases (first level), etc.

So what should I do? I have backup of world, but since then there were very many changes. I have latest version of OC (1.8.3) and Minecraft 1.12.2

[asiekierka]

To recover the world in this scenario, IIRC your best bet is to try and copy just the level.dat from the previous backup to the new one. This might help, but I can't promise anything. Make a backup of the corrupted world as well.