Cubase 15.0.20 Bugs Explained: Logical Editor Issue and How to Avoid Problems

This article is based on personal research and real-world experience. The issues described may not occur in all environments. For the latest and official information, please check the Cubase official website and forums.

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Introduction

Cubase 15.0.20 was released on April 1, 2026, as a maintenance update.
However, since the update, several serious issues have been reported by users.

I have been using Cubase for over 15 years, and
👉 this update, especially the Logical Editor bug, is one of the more impactful problems I’ve seen.

In this article, I’ll explain the major issues and practical ways to deal with them.

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Critical Issue: Logical Editor Values Reset

What happens?

When opening presets created in earlier versions (such as 15.0.10):

• Values reset to 0
• Or change unexpectedly (e.g., 100 → 99)

This affects:

• Logical Editor
• Project Logical Editor

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Why this is serious

👉 It breaks automated workflows

If you rely on:

• Velocity processing
• CC control
• MIDI transformations

This bug can completely disrupt your workflow.

Even worse:

👉 Saving the project may overwrite correct values

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Workarounds

• Manually re-enter values
• Roll back to version 15.0.10

👉 Currently, rolling back is the safest option

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My experience

I personally use the Logical Editor regularly, and this issue is genuinely problematic.

👉 If you don’t notice it, it can easily lead to mistakes in your production.

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ARA Plugin Crashes (Melodyne, etc.)

Issue

• Cubase crashes while loading a project
• Often during audio track loading

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Possible cause

ARA plugins such as:

• Melodyne
• Waves Sync Vx

These may be unstable in Cubase 15.0.20.

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Workarounds

• Launch Cubase in Safe Mode (disable plugins)
• Render ARA edits before opening
• Roll back to 15.0.10

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Crash When Importing Files

Issue

• Immediate crash when importing via MediaBay or menu

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Error

• Access memory violation

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Notes

• Possibly related to RAM handling
• May depend on system environment

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Mixer Sends Issue

Issue

• Adjusting Sends across multiple tracks does not apply correctly

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Notes

👉 This issue may have existed since Cubase 14
and is still not fully resolved.

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Known Limitations (UI Scaling)

This is not a bug, but an important limitation.

Affected plugins

• VST Amp Rack
• VST Bass Amp
• Retrologue 2
• Padshop 2
• HALion Sonic 7
• LoopMashFX

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Issue

👉 Not fully compatible with high-DPI scaling

• UI may appear too small
• Layout issues may occur

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Should You Roll Back?

Cubase updates are usually followed by fixes relatively quickly.

👉 If you have already updated to 15.0.20,
waiting for a patch might be the better option.

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Important note

Rolling back or reinstalling may cause:

• Settings inconsistencies
• Plugin recognition issues
• License-related problems

👉 Rolling back is not always the safest solution

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Final Thoughts

To be honest:

👉 Cubase 15.0.20 is best treated with caution for now

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Be careful if you:

• Use the Logical Editor
• Rely on ARA plugins
• Need a stable production environment

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Recommended setup

• Keep using a stable version (like 15.0.10)
• Use 15.0.20 only for testing

👉 Separating work and testing environments is the safest approach

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Conclusion

• Logical Editor bug is critical
• ARA plugins may cause crashes
• Import-related memory errors reported
• Some older issues still remain
• Updating right now is not recommended for everyone

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Final Note

Cubase is a powerful DAW, but major updates often come with instability.

This time, especially:

👉 Advanced users are more affected

So instead of chasing the latest version,

👉 prioritizing stability is the smarter choice.