The sonarlint inspection banner appears three times at the top of the editor window for each triggering issue. See attached screenshot.
Versions:
IntelliJ IDEA 2018.2 (Community Edition)
Build #IC-182.3684.101, built on July 24, 2018
JRE: 1.8.0_152-release-1248-b8 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 3.10.0-862.9.1.el7.x86_64
SonarLint 3.5.0.2729