Noisy output in REPL - NSEvent Assertion Failures

I'm experiencing #16 , on OpenJDK 11.

Switching REBL from foreground to background and back repeats this output in my REPL:

user=> 2019-05-02 10:20:07.889 java[13969:468312] unrecognized type is 4294967295
2019-05-02 10:20:07.889 java[13969:468312] *** Assertion failure in -[NSEvent _initWithCGEvent:eventRef:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1671.40.119/AppKit.subproj/NSEvent.m:1977
2019-05-02 10:20:11.317 java[13969:468312] unrecognized type is 4294967295
2019-05-02 10:20:11.317 java[13969:468312] *** Assertion failure in -[NSEvent _initWithCGEvent:eventRef:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/AppKit/AppKit-1671.40.119/AppKit.subproj/NSEvent.m:1977

I'm on macOS 10.14.4.

$ java -version
openjdk version "11.0.2" 2019-01-15
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.2+9)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.2+9, mixed mode)

deps.edn:

:rebl {:extra-deps
                  {org.clojure/clojure {:mvn/version "1.10.0"}
                   org.clojure/core.async {:mvn/version "0.4.490"}
                   org.openjfx/javafx-fxml     {:mvn/version "11.0.1"}
                   org.openjfx/javafx-controls {:mvn/version "11.0.1"}
                   org.openjfx/javafx-swing    {:mvn/version "11.0.1"}
                   org.openjfx/javafx-base     {:mvn/version "11.0.1"}
                   org.openjfx/javafx-web      {:mvn/version "11.0.1"}
                   com.cognitect/rebl {:local/root "/Users/r627543/REBL-0.9.157/REBL-0.9.157.jar"}
                   ;; deps for file datafication (0.9.149 or later)
                   org.clojure/data.csv {:mvn/version "0.1.4"}
                   org.clojure/data.json {:mvn/version "0.2.3"}
                   org.yaml/snakeyaml {:mvn/version "1.23"}
                   ;; database datafication
                   seancorfield/next.jdbc {:mvn/version "1.0.0-alpha12"}}}

cognitect-labs / REBL-distro

Noisy output in REPL - NSEvent Assertion Failures #27