Fresh project import fails to load IDE frames properly

[Darkyenus]

When opening a non IntelliJ project in IntelliJ for the first time, frames around the IDE don't load properly.
A workaround is to close the project and open it again.

This is caused by:

kotlin.KotlinNullPointerException
at com.intellij.openapi.wm.impl.ToolWindowManagerImpl$beforeProjectOpened$2.run(ToolWindowManagerImpl.kt:410)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:201)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
at com.intellij.openapi.application.impl.ApplicationImpl.lambda$invokeLater$4(ApplicationImpl.java:310)
at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:80)
at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:128)
at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:46)
at com.intellij.openapi.application.impl.FlushQueue$FlushNow.run(FlushQueue.java:184)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:776)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:727)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:746)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:974)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:847)
at com.intellij.ide.IdeEventQueue.lambda$null$8(IdeEventQueue.java:449)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:741)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:448)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:496)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

But it is unclear what causes it, i.e. why is frame null when it is. Maybe I am using wrong API, but this is hard to determine without proper documentation. Besides, the API around project creation is constantly changing, so maybe it will fix itself, or it will be fixed in another rewrite.