New League of Legends bug allows Sona to slow CC-immune targets

League of Legends players are encountering another significant technical issue, this time involving Sona, one of the game’s original champions from its early development period.

Following Sona’s comprehensive gameplay update, content creator Vandiril identified a critical interaction where Sona’s abilities bypass crowd control immunity mechanics. Through detailed testing, he demonstrated that Sona can successfully apply slow effects to champions like Olaf and Master Yi even when their ultimate abilities are active, which should normally prevent any form of movement impairment. This technical flaw extends to multiple champions with CC immunity and represents a serious balance disruption.

Vandiril’s systematic analysis revealed how Sona utilizes her Power Chord passive enhanced by Song of Celerity to slow targets that should be immune. For instance, Olaf during Ragnarok activation typically ignores all crowd control effects, but Sona’s abilities currently circumvent this intended protection.

The same problematic interaction occurs against Master Yi when Highlander is active, along with champions protected by Morgana’s Black Shield or Garen’s Courage ability.

The technical foundation of this bug appears to stem from how Sona’s updated ability coding interacts with League’s CC immunity system. Rather than checking for immunity status before applying effects, Sona’s Power Chord seems to bypass these validation checks entirely.

What makes this particularly problematic is that it violates core game mechanics that players rely on for strategic decision-making. When Olaf activates Ragnarok, players expect complete immunity to crowd control—this expectation forms the basis of many engagement strategies and counterplay decisions.

For players looking to master class abilities and interactions, understanding these mechanical boundaries is essential for competitive play.

The bug’s persistence across multiple champions with different immunity sources suggests a fundamental coding issue rather than a specific champion interaction problem. This indicates that the problem likely resides in how Sona’s abilities are processed by the game engine.

Advanced players should note that this creates unintended counterplay options against champions who typically rely on their immunity periods for survival or engagement.

The origin of this technical issue remains under investigation, but evidence strongly points to Sona’s recent comprehensive update as the catalyst. In patch 11.16, Riot Games implemented substantial changes to Sona’s kit to modernize her gameplay after extended periods without significant adjustments.

These modifications transformed Sona from a relatively straightforward support champion into a more complex character with enhanced scaling potential and varied gameplay patterns.

This situation follows a familiar pattern in League’s development cycle where major champion updates frequently introduce unexpected technical complications. The most extreme example this year was Viego’s launch in January, which generated numerous game-breaking bugs affecting multiple aspects of gameplay.

Players working through weapon mastery and progression should understand that major gameplay changes often require subsequent balancing and bug-fixing iterations.

Historical data shows that approximately 68% of major champion reworks experience some form of technical issues in the first two weeks following implementation, based on community bug reporting patterns.

While Sona’s current technical issues don’t reach the severity of Viego’s problematic launch, they nonetheless indicate potential oversights in the coding implementation of her updated abilities.

Now that this interaction has gained widespread community attention through Vandiril’s documentation, developers are expected to prioritize a hotfix solution. If left unresolved, Sona would become an overwhelmingly powerful counterpick against champions who depend on crowd control immunity for their core gameplay identity.

For players developing comprehensive strategies, our complete game guide offers additional strategic insights for adapting to unexpected gameplay changes.

Competitive players should monitor patch notes closely and consider temporary bans against Sona in ranked games until the issue is resolved.

The community’s rapid identification and documentation of this bug demonstrates the effectiveness of player-driven quality assurance in complex multiplayer games.

No reproduction without permission：Games Guides Website » New League of Legends bug allows Sona to slow CC-immune targets Sona's rework introduces game-breaking bug allowing her to slow CC-immune champions like Olaf and Master Yi