Enter after Double shift is not working now

I am using;

IntelliJ IDEA 2018.2.5 (Community Edition)
Build #IC-182.4892.20, built on October 16, 2018
JRE: 1.8.0_152-release-1248-b19 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 4.15.0-36-generic

Accessing a file that is listed on quick search (double shift) with Enter key is not working after update.