IntelliJ 2026.1.3 fixes UI glitches, terminal/tmux issues, WSL/Gradle bugs, Markdown preview, and various IDE crashes.
IntelliJ 2026.1.3 from JetBrains has landed, bringing several highly requested bug fixes that target common UI glitches and terminal rendering issues.
If you run tmux inside the integrated terminal, the IDE no longer renders the cursor above the active line. The Markdown preview bug, which was fixed in this release, had annoyed developers for quite some time, as the preview pane failed to render images saved outside the project directory. Instead of displaying the actual image, the IDE simply showed a broken image icon, a problem that stuck around for two years before this update.
Over on Windows, developers running WSL can now use wsl.exe to spin up their environments without losing terminal functionality. In previous builds, launching a terminal shell with something like wsl.exe -d ubuntu inside a Windows-based project broke both shell integration and active process detection.
Other bug fixes in this release include:
- An issue where Gradle sync incorrectly reported success as a failure on WSL when using Gradle 9.5.0.
- A syntax highlighting bug that flagged valid Java for-loop initialization blocks with multiple statements as incorrect.
- A warning bug that triggered a false non-null local variable alert when using JSpecify annotations.
- A database generation bug that hid the option to use a DELETE statement instead of a TRUNCATE checkbox.
- A Kotlin highlighting failure where an assertion error in the Gradle redundant library inspection broke error highlighting.
- A UI bug where the ComboBox popup lacked a maximum height restriction.
- A Snowflake syntax error where DataGrip failed to support the “create temp” command.
- A Svelte syntax parsing failure that incorrectly flagged quotes inside inline expressions.
- A VCS repository manager deadlock that triggered thread pool exhaustion.
- A memory leak where the LazyTree component kept all previous versions of a tree in memory.
IntelliJ 2026.1.3 is the third bug fix release for the IntelliJ 2026.1 series. The first one landed back in April with a fix for the WSL Python interpreter freeze, another fix for guest participants using Emmet abbreviations, and corrected WildFly server deployment errors.
