Original report by Harsha Hapuarachchi (Bitbucket: harsharest).

CEF_VERSION - 87.1.12

The CEF message router docs describe multiple workflows for queries, one being the "subscription" style where the "persistent" flag is set to true in JS. In the "subscription" style workflow, the success callback can be repeatedly called.

Currently JCEF does not take this persistent value into account, and clears the reference to the CefMessageRouterBrowserSide::Callback when success is called. This results in a somewhat surprising behavior as the the callback's success method can be called repeatedly from java, however it does not result in the callback being called again.

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Same issue as : #186/even-for-queries-with-persistent-set-to