When setup cursor and move it without left click intelj select all text followed by the cursor.
Version

IntelliJ IDEA 2024.1.4 (Community Edition)
Build #IC-241.18034.62, built on June 20, 2024
Runtime version: 17.0.11+1-b1207.24 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Linux 6.5.0-44-generic
GC: G1 Young Generation, G1 Old Generation
Memory: 2048M
Cores: 8
Registry:
  ide.experimental.ui=true
Non-Bundled Plugins:
  IdeaVIM (2.15.1)
  IdeaVimExtension (1.7.4)
  Docker (241.18034.82)
  dev.eltonsandre.kafka (2023.0.6)
  Lombook Plugin (241.18034.62)
  com.deploytools.plugin (1.4)
  MavenRunHelper (4.28.0-IJ2022.2)
  com.yiycf.plugins.mavenDependencyHelper (2.5)
  ch.newinstance.plugin.mavendependencychecker (1.11.0)
  org.kubicz.mavenexecutor.plugin.id (2.1.1)
Kotlin: 241.18034.62-IJ
Current Desktop: GNOME-Classic:GNOME: