Barely a day after the RaceRoom Summer Update landed with the DTM 2026 pack, a reworked Nordschleife and the brand new COSMO UI HUD, KW Studios has pushed out a follow-up patch. It’s tiny — 17 MB against the 7.2 GB of the main update — but it exists for one reason: the Summer Update introduced a handful of crashes, and those needed squashing fast.
Client version moves to 0.9.8.06, BuildID 24573583. No new content, no physics changes, nothing to reset your leaderboards over. This is a stability patch, and given how much new code shipped yesterday — a full HUD compositor built from scratch, plus multiplayer netcode changes — a same-week hotfix was more or less inevitable.
Four crashes, gone
The bulk of the patch is crash fixes, and they read like a direct consequence of yesterday’s changes:
- A multiplayer crash when loading into a race
- A crash tied to custom liveries, triggered when a driver left the session while their livery was still downloading
- A startup crash caused by the shadow depth texture failing to be created
- A crash inside the new HUD compositor’s draw order
That last one is the most telling. The COSMO UI HUD replaced a Flash-based system that had been running since 2013, and a compositor draw-order crash is exactly the kind of bug you’d expect from a rendering pipeline that’s days old rather than years old. Nothing here suggests the HUD rework is in trouble — it’s the normal cost of shipping something built from the ground up.
Simucube owners get a proper fix
Two controller fixes are aimed squarely at Simucube wheel base owners. A crash on the second drive attempt after a failed write to the base is fixed outright, and — more usefully day to day — a Simucube base that drops its connection mid-session will now retry the connection instead of staying dead until you restart. Previously that meant a lost session; now it’s a brief hiccup at worst.
WebHUD and broadcast mode sorted too
Two smaller HUD-adjacent fixes round out the patch. The new HUD now stays dormant in broadcast spectator mode, so it won’t intrude on stream overlays the way an early build apparently did. And WebHUD pages served from the web can reach localhost again — a fix that matters more than its one line suggests, since it restores telemetry links like SealHUD with CrewChief, which plenty of endurance and league racers rely on for pit strategy and stint tracking.
None of this changes what RaceRoom looks or plays like. This makes the major update from a few days ago truly useful for everyone who encountered one of these four bugs. Expect more quick fixes like these in the coming days, as COSMO’s user interface continues to stabilize.
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