Hi all,

We’ve built a Figma plugin that converts frames into MJML/HTML using a WebAssembly module. On some machines the plugin works fine, but on others (mostly Macs with Apple Silicon) it crashes part-way through with this error:

What happens:

• Some components (usually text) render successfully.

• As soon as the plugin hits a problematic component, it throws the error and everything after that fails to generate.

• The issue isn’t consistent — some users/accounts never see it, while others hit it frequently.

What we’ve tried:

• Clearing Figma caches and reinstalling the desktop app.

• Testing on multiple accounts and machines.

• Disabling Cloudflare/WAF rules on our API.

• The problem still persists.

Impact:

Users can’t reliably export frames — exports stop midway and produce incomplete output.

Suspected cause:

It looks like the WASM module is running out of memory or hitting a bug with certain text inputs. The error consistently comes from the WASM runtime.

Has anyone run into this before with plugins that use WASM?

• Are there known memory limits in Figma’s plugin environment that could explain this?

• Any best practices for handling text safely to avoid these crashes?

• Would recompiling the WASM with different memory settings help?

Any guidance would be greatly appreciated — we’d love to make the plugin more reliable for users across all machines.

Thanks!