[IntelliJ] Uncaught Exception Operator called default onErrorDropped reactor.core.Exceptions$ErrorCallbackNotImplemented: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 10000ms in 'subscribeOnCallable' (and no fal

IntelliJ build version: 2024.3.2.2 IU-243.23654.189
OS: Windows 10
JDK: JetBrains s.r.o. 21.0.5
Plugin version: 3.94.0-2024.3
Additional Info: None
Parent component:

com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog$DialogRootPane[,6,0,824x534,invalid,layout=javax.swing.JRootPane$RootLayout,alignmentX=0.0,alignmentY=0.0,border=,flags=449,maximumSize=,minimumSize=,preferredSize=]

Error message:

IdeaLoggingEvent[message=Operator called default onErrorDropped, throwable=reactor.core.Exceptions$ErrorCallbackNotImplemented: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 10000ms in 'subscribeOnCallable' (and no fallback has been configured)
Caused by: java.util.concurrent.TimeoutException: Did not observe any item or terminal signal within 10000ms in 'subscribeOnCallable' (and no fallback has been configured)

The report provides only IntelliJ, Windows, JDK, plugin versions, and a Reactor timeout message; it names no source file, test, or entry point. First reproduce the exception in the listed environment and trace the plugin code that handles the timed-out subscribeOnCallable operation; done should include a confirmed cause and a regression test or verified fix.