Video freezing during rewind when shaders enabled with Metal-Build

[pantra64]

Description

Rewinding with the Metal-Build of RetroArch on my M1 Macbook Air works as expected unless I enable and apply a shader. Afterwards video will freeze whenever I rewind. The Intel-Build doesn't do this.

Expected behavior

Video should be rewinding during rewind.

Actual behavior

Video freezes until rewind is finished. Then it skips and resumes at the current rewind-state

Steps to reproduce the bug

1. enable rewind
2. enable shaders and load any shader
3. start any game with any core
4. initiate rewind

• OS: macOS Monterey 12.0.1

[pantra64]

Bug still exists with Metal, screen turns black now instead of freezing, but on the bright side with the new Vulkan Driver since RetroArch 1.15 everything works as expected.