2020.3 EAP Incompatible with JDK8?

Hello,

We're testing our plugin on the 2020.3 EAP (LATEST-EAP-SNAPSHOT) and we are having some trouble building our plugin against this version with JDK8, failing with an error like

import com.intellij.openapi.projectRoots.Sdk;

bad class file: <DIRECTORY>/ideaIC-LATEST-EAP-SNAPSHOT/lib/platform-api.jar(com/intellij/openapi/projectRoots/Sdk.class)

class file has wrong version 55.0, should be 52.0

Please remove or make sure it appears in the correct subdirectory of the classpath.

However the build completes successfully with JDK11. Will the 2020.3 release actually be compatible with Java 8?

Many Thanks
Scott Smith