I've had a custom modpack for several months and it's been working fine. Sometimes, when updating mods from the launcher, I'd have to disable and enable a random mod in order to click the update buttons. I didn't mind this.
However, I launched this modpack today and there were around 6,000 missing entries in my world because many different mods randomly uninstalled themselves. What is the cause of this? How can I prevent it?
I've been launching the world to read the missing entries in order to track down the mods that disappeared. Even with small GUI scale, it's taken many boots. This is the only way I know how to track the mods down. I fear that I'll miss certain mods which don't add items and that this disappearance of mods will happen again.
Yes, it's very discouraging and frustrating. In the process of relocating the missing mods I've found that some are not even on curseforge anymore, including PlucTic (for seemingly obvious reasons) and Tinker's Alloying Addon (TAIGA). 3rd party file for TAIGA causes crash upon launch.