After Effects memory allocation error despite 128 GB RAM

I’m repeatedly getting “Unable to allocate memory” (Error 12803) while previewing and rendering, sometimes failing to allocate as little as 126–512 MB, which makes no sense given my system.

This happens on relatively simple comps (text, credits), and never used to happen in older AE versions. It occurs both during preview and render, sometimes mid-render after a few minutes.

I am using AE 25.5. 

System specs:

• CPU: AMD Ryzen Threadripper 3970X (32-core)

• RAM: 128 GB

• OS: Windows 11 Pro (22H2)

• AE Memory available: 112 GB

• Multi-Frame Rendering: Enabled (issue also happens intermittently with it off)

Disk cache is on a fast local drive, and memory preferences are correctly configured.

This feels like a regression in recent AE versions, possibly related to MFR or memory fragmentation. Looking for confirmation, workarounds, or known bugs related to this behavior.