This is a real postmortem, not a curated highlight reel. Five bugs from the last sprint of EFER development. Names changed, code omitted, but the lessons are real.
Bug 1: The night-raid spawn flag
**Symptom:** Night raids spawned in the wrong faction’s territory.
**Cost:** 2 hours to debug, 30 minutes to fix, 1 player complaint on Discord.
**Root cause:** Stale reference to the contested-zone flag. The waymark had moved the previous day, the spawn code was still pointing at the old coordinate.
**What I’d do differently:** Server-side tests that resolve against the live waymark, not fixtures. The fixture-based test passed because the test data was right; the live test would have failed because the live data was wrong.
Bug 2: The Convergence shield wall flicker
**Symptom:** New players in the safe hub saw a brief moment of faction-vs-faction combat UI flicker before the shield kicked in.
**Cost:** 1 hour to debug, 15 minutes to fix.
**Root cause:** Client-side render order. The shield wall check happened AFTER the faction-flag was assigned, not before. The result: a 16ms window where the UI thought PvP was enabled.
**What I’d do differently:** Order of operations audit. The shield check should be the first thing after the player loads, before any faction flag is read.
Bug 3: The Essence VFX texture miss
**Symptom:** A skill’s visual effect rendered with a default texture instead of the faction-coded one.
**Cost:** 4 hours (3 hours to find, 1 hour to fix).
**Root cause:** The skill emitter was looking up the texture by a key that included the faction name, but the lookup table was keyed by the Essence ID only. So Alliance, Horde, Sylvan all rendered with the same default gray texture.
**What I’d do differently:** Better naming conventions. The lookup key should be deterministic, not dependent on string concatenation with the faction name.
Bug 4: The construct swarm lag spike
**Symptom:** Server tick rate dropped from 60Hz to 12Hz when the Clockwork player activated their construct swarm ability.
**Cost:** 6 hours to debug, 2 hours to fix.
**Root cause:** The swarm logic was running on every server tick for every Clockwork construct, even when the player wasn’t doing anything. Total CPU load: 40 constructs × every tick = ~1200 entity checks per second.
**What I’d do differently:** Throttle the swarm logic to 4Hz. The constructs don’t need to update every tick — they need to update enough that the player sees smooth movement.
Bug 5: The post-reset transition cinematic skip
**Symptom:** Some players reported the transition cinematic skipped after a server crash + auto-restart.
**Cost:** 3 hours to debug, 1 hour to fix.
**Root cause:** The cinematic was tied to a session-level flag. After a server restart, new sessions didn’t have the flag set, so the cinematic didn’t play. But the player’s client thought they had seen it (because their session was restored), so the cinematic state was desynced.
**What I’d do differently:** Persist the cinematic-seen flag in the player record, not the session. Server restarts shouldn’t reset what a player has seen.
The lesson I’m taking forward
Every bug was a process gap. The fixes were code; the lessons were process.
- **Stale references** — add a stale-reference check to every waymark lookup
- **Order of operations** — audit render order on every UI screen
- **Naming conventions** — never use string concatenation for lookup keys
- **Throttling** — every per-tick logic needs an explicit tick rate
- **Persistence** — never tie player-state to session-state
The bugs are fixed. The code is shipping. The lessons are in the operator playbook.
What I’m building next
- The Clockwork construct-summon skill (the animation is fighting me)
- Polishing the Convergence hub (visual fidelity at 60% of where I want it)
- The post-reset season-transition cinematic (15 seconds, 4 days of iteration)
- One specific bug where the night-raid spawn sometimes picks the wrong territory — wait, I fixed that one. Two days ago.
Read the related lore
The lore of EFER is the foundation for the design. If you want to understand why the contested zone is contested, read /lore/. If you want to understand why the 30-day reset exists, read /how-the-30-day-reset-became-the-law-of-the-world/.
Play EFER on Roblox. Free.
