[Bug] createShortCache bypasses cache when value is falsy (false, 0, "") #1160

🙋 SDK Version

Latest main (@flowgram.ai/utils)

📌 Layout

All layouts (Core Utility / Reactive Cache)

💻 Environment

• Operation System: All (Cross-platform)
• Node.js: 18 / 20 LTS

📝 Description

In @flowgram.ai/utils (packages/common/utils/src/cache.ts), createShortCache uses if (cache) to determine cache validity:

if (cache) {
  updateTimeout();
  return cache;
}

When a cached value is falsy (e.g. false, 0, "", null), if (cache) evaluates to false, causing the cache to be bypassed on every subsequent get() invocation and executing the compute function repeatedly.

In addition, ShortCache lacks a dispose() / clear() method to clean up active setTimeout timers on teardown.

I have a verified minimal fix with regression tests ready to submit.