[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: 2025.2.1 IU-252.25557.131
OS: Windows 11
JDK: JetBrains s.r.o. 21.0.8
Plugin version: 3.96.1-2025.2
Additional Info: None
Parent component:

com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog$DialogRootPane[,8,0,824x534,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)

No source file, test, reproduction steps, or expected behavior are provided. Start by reproducing the timeout with IntelliJ 2025.2.1, Windows 11, JDK 21.0.8, and plugin 3.96.1-2025.2, then trace the reported subscribeOnCallable error to its owning component. Done requires identifying the timed-out operation and confirming a targeted fix with a regression test.