[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: 2025.3.2 IU-253.30387.90
OS: Windows 11
JDK: JetBrains s.r.o. 21.0.9
Plugin version: 3.97.1-2025.3
Additional Info: None
Parent component:

com.intellij.openapi.wm.impl.IdeRootPane[,8,8,1920x1032,invalid,layout=com.intellij.openapi.wm.impl.IdeRootPane$CustomHeaderRootLayout,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)

Start by reproducing the report with IntelliJ IDEA 2025.3.2, Windows 11, JDK 21.0.9, and plugin version 3.97.1-2025.3. Trace the source of the Reactor timeout in the IntelliJ integration and determine why it is reported as an uncaught dropped error. Done means the triggering path is identified and the timeout is handled without the reported exception.