Bug Report

After adding some crafting automation to my ME network (a few mekanism machines with interfaces and export buses, inscribers with Integrated Logistics pipes, and a blob of matter assemblers and interfaces), I started getting a problem where after leaving the area (either going ~20 chunks away or going to another dimension), and returning, my ME network and several things nearby would be glitched out: smart cables and anything in their blocks invisible (export/import buses, ME terminals, cable anchors) and nonfunctional, some Immersive Engineering multiblocks would be duplicated (a 2x2 area would have one copy centered on each of the 4 blocks; for me, it happened to my Advanced Coke Oven and Industrial Squeezer, but not the also-nearby Arc Furnace or Crusher). Breaking the ME controller and replacing it reset the network back to the normal state but it would occur again if I left.

Some troubleshooting/workarounds I tried, to no effect:

• F3+a
• Adding a Weirding Gadget to keep the ME network chunks loaded
• Disconnecting branches of the ME system (even with all branches disconnected it still occurred, and actually made replacing the ME controller not fix the whole network until a cable was placed to cause a branch to connect to the controller)
• Removing the Immersive Engineering machines that got duplicated
• Save/load (this didn't even reliably restore the network as a one-time operation, breaking and replacing the controller was usually still needed)
• Restarting the game (same as save/load)

Broken state (after leaving and returning):

Fixed state (after replacing ME Controller):

Expected Behaviour

Leaving and returning should not disconnect/hide the ME cables or glitch Immersive Engineering structures.

Possible Solution

Not sure. Possibly an issue with AE2 itself (seems similar to AppliedEnergistics/Applied-Energistics-2#2183, but that's pretty old and the things blamed there don't appear to be present in Sevtech).

Steps to Reproduce (for bugs)

1. Reach Age 5
2. Create large ME Network (mine had a drive full of 64k cells, ~20 interfaces, ~50 crafting patterns, 5 matter assemblers, 5 export buses with crafting cards, 2 import buses with speed cards, a crafting terminal, and a pattern terminal). It may also need to span some range-- mine was contained within 3 chunks but extended some 40 blocks vertically (mostly a single cable up and down from the controller).
3. Move far away, or to another dimension, and return.

Logs

• Client/Server Log: https://gist.github.com/rezecib/d3c45e19add0250b692e8726249b1b69
• Crash Log: Not a crash

Client Information

• Modpack Version: 3.1.2 Hotfix 1
• Java Version: Java 1.8.0 51 64bit
• Launcher Used: Twitch App (reports forge-14.23.5.2838/fml,forge on F3)
• Memory Allocated: 12288 MB (in Twitch launcher, F3 reports 10923 MB)
• Server/LAN/Single Player: Single Player
• Optifine Installed: No
• Shaders Enabled: No

World Information

• Modpack Version world created in: I believe 3.1.0 (I upgraded before leaving Age 0)

• Additional Content Installed: None

I made a copy of the save but it is fairly large (400mb compressed), but I uploaded it to Google Drive. Or alternatively if you know how to carve out the relevant part of it and would like me to do so, let me know.