Summary A regression in Android 16 (API 36) prevents isHeading from being honored on TextView elements, even when using AccessibilityDelegateCompat or ViewCompat.setAccessibilityHeading. This behavior works on earlier Android versions but silently fails on API 36. Root Cause Android 16 introduces changes to accessibility behavior that affect how heading metadata is interpreted. Internal platform changes in … Read more
Summary This incident involved an AutoCAD user attempting to explode a single block containing multiple floor plans, only to find that the block repeatedly returned to its original state. The behavior was confusing but ultimately expected given how nested blocks and block definitions work in AutoCAD. Root Cause The underlying issue was nested block structures … Read more
Summary This postmortem analyzes a failure that occurred when attempting to compute Potential Evapotranspiration (PET) using the Thornthwaite method in R. The issue stemmed from incorrectly deriving per‑pixel latitude from a raster stack, leading to invalid PET outputs and runtime errors. Root Cause The root cause was the misuse of: yFromCell(Temperature_stack, 1:nrow(Temperature_stack)) This call returns … Read more
Summary YouTube Data API v3 channel IDs are unique, permanent, and non-reusable, making them suitable as primary keys in database designs. However, edge cases exist, and understanding their behavior is critical for data integrity. Root Cause The question stems from uncertainty about YouTube’s channel ID management. Key concerns include: Uniqueness: Can duplicates occur? Immutability: Can … Read more
Summary This incident involved a scroll‑triggered class toggle that never fired, preventing a full‑screen hero image from transitioning into a smaller, side‑aligned layout. The failure stemmed from missing JavaScript event handling, incorrect element positioning, and CSS rules that prevented the intended transformation from ever being observable. Root Cause The root cause was that no functional … Read more
Summary This incident analyzes a misinterpretation of how multi‑tenant Postgres RLS and connection management work in a NestJS + TypeORM SaaS architecture. The core confusion: believing that each user session requires its own database connection, leading to fears of millions of connections. The real issue is not RLS itself, but incorrect scoping of the Postgres … Read more
Summary This incident involved a Unity Android build crashing immediately after the splash screen on subsequent launches. The crash only resolved temporarily when the app cache was cleared, and on some devices it never recovered. The logcat trace pointed directly into Mono’s Boehm garbage collector (libmonobdwgc-2.0.so), indicating a memory corruption or invalid GC state triggered … Read more
Summary This postmortem analyzes a common API‑design failure: misusing the “Async” suffix when naming functions. The confusion stems from mixing up asynchronous execution, non‑blocking behavior, and coroutines that yield. When these concepts are blurred, developers ship APIs that mislead callers, cause misuse, and create long‑term maintenance pain. Root Cause The core issue is treating “Async” … Read more
Summary The Marker.js updateMarker logic triggers re-renders even when the new position has the same coordinates (LAT + LONG) as the previous position. Despite memoizing markers using useMemo, the entire set of markers still flickers during updates. Root Cause The default comparison logic in updateMarker checks for strict equality (prevPosition === newPosition), which fails when … Read more
Summary A shortcode‑based Gutenberg block that displays top‑level WooCommerce product categories appeared everywhere except on product category archive pages. WooCommerce’s template loading and conditional logic prevented the block from rendering, causing the category list to disappear exactly where the merchant needed it most. Root Cause WooCommerce category archive templates apply conditional suppression of top‑level category … Read more