A new Diablo Immortal bug report claims that a progressive legendary gem upgrade consumed two purchased gems and gem power, but failed to increase the main gem’s progress as expected. That is the kind of sentence that makes Immortal players instinctively check their inventory twice.
The report involves a Void Spark upgrade
According to the player, they had a rank 6, 48% progressive, 4/5 quality Void Spark. They then purchased two 2/5 quality Void Spark gems from the platinum auction house and went to the jeweler to upgrade it.
The expected result, according to the report, was that the gem would move from 48% progress to 64%. Instead, the player says both gems and gem power were consumed, while the Void Spark stayed at 48%. In loot-game language, that is not a hiccup. That is the machine eating your offering and refusing to blink.
This is bug-watch, not a confirmed widespread issue
At the time of writing, the thread appears to be a single iOS bug report without a visible Blizzard response. So this should not be treated as proof that progressive legendary gem upgrades are broken for everyone.
But it is still worth watching because of what is involved. Legendary gems are not throwaway junk. They are one of Diablo Immortal’s most sensitive systems, tied to progression, builds, resonance, platinum, and the kind of resource investment that makes players suddenly become forensic accountants.
Immortal bugs feel worse when expensive systems are involved
Diabloz recently covered a separate Diablo Immortal issue where locked items may still get salvaged in a specific bulk-salvage scenario. This new gem report sits in the same panic cabinet: small sample size, but deeply unpleasant if it hits you.
There is a difference between a visual bug and a resource bug. A typo can be annoying. A missing animation can be funny. But when player-owned materials disappear during an upgrade, the mood changes instantly. That is not cosmetic weirdness. That is wallet-adjacent horror with a gem icon.
Check your upgrades before you click again
Until Blizzard comments or more reports appear, the safest advice is boring but practical: pay attention before and after upgrading progressive legendary gems. Screenshotting your gem progress, materials, and upgrade screen is not glamorous, but neither is trying to explain vanished resources after the fact.
For now, this is a single report, not a full-blown crisis. Still, Diablo Immortal players know the rule: when the jeweler starts acting haunted, you stop feeding the furnace and count your gems.
