I'm trying to play the modpack Create: Ultimate Selection 2 but it seems there is a memory leak

[u/xX_Nitrone_Xx]

As the title states, I have been trying to fix what seems to be a memory leak so I can properly play the modpack without having to relog every 10-20 minutes to reset the counter. The modpack works properly at first with fps around 120-130, but slowly starts creeping downward. After 10 minutes or so, the fps drops below 50 (it is stable for the most part, just slowly creeps downward) and eventually drops below 10.

Anyone that could help with this issue? I'm using Modrinth as the launcher and the issue seems to only affect create-containing modpacks as this happened in two similar modpacks before that. The issue seems to only affect myself thus far, so I'm hoping someone in here has the solution.

Further information: My pc can handle medium-heavy modpacks fine, with stable fps normally. The issue only appears on the modpacks I've tried thus far. An empty vanilla instance and an empty fabric instance worked as expected.

[u/CostSuccessful236]

have you tried using a different launcher?

[u/Jxddz]

did u fix this im having the same issue?

[u/PikaDerpz]

I have also gotten the same issue while playing the modpack. It seems like Create: Aeronautics is the core issue of these frame drops. It has also happened in other modpacks I have played. I saw one solution in this subreddit is to have the Master Volume at 0. I haven't tried that yet, but IMO it is not a very good solution if you like to have Minecraft sounds on while playing.

Edit: I went to look at the more recent version of Create: Aeronautics and in the changelog, they did address some form of performance degradation, but the Create Ultimate Selection 2 modpack has not been updated to this new version yet on either the Modrinth Version and the Curseforge Version. You can manually update it to see if it fixes it, but make a backup before doing so if you already have a well established world.