After updating Intellij and PHPStorm to 2021.1.1 the plugin was also updated to 6.4.0.
Since then project view and other tool windows using trees are too compact / tight.
whitespaces between tree entries

IntelliJ IDEA 2021.1.1 (Ultimate Edition)
Build #IU-211.7142.45, built on April 30, 2021
Runtime version: 11.0.10+9-b1341.41 x86_64
VM: Dynamic Code Evolution 64-Bit Server VM by JetBrains s.r.o.
macOS 11.3
GC: G1 Young Generation, G1 Old Generation
Memory: 8192M
Cores: 12
Registry: ide.new.stripes.ui=true, ide.balloon.shadow.size=0
Non-Bundled Plugins: com.intellij.nativeDebug (211.7142.13), com.jinsihou.react.snippets (1.1.0), com.mallowigi (36.0), org.intellij.plugins.hcl (0.7.10), org.jetbrains.plugins.go-template (211.6693.44), name.kropp.intellij.makefile (211.6693.108), org.sylfra.idea.plugins.linessorter (1.0.1), com.intellij.kubernetes (211.7142.13), idea.plugin.protoeditor (2.3.1), com.chrisrm.idea.MaterialThemeUI (6.4.0)
Kotlin: 211-1.4.32-release-IJ7142.27
Yes I noticed. I will fix it soon, it should be 28, not 18
Workaround is to set sidebar height to 28 :)
It's so annoying, in my case after each update this issue occurs again and again.
sent an hotfix, please update
sent an hotfix, please update
I have just updated and can confirm that it's fixed now. Thank you so much for the fast replay and quick fix.