-XX:+PrintFlagFinal shows MaxHeapSize := 0 when heap size is a multiple of 4 GiB

Issue

-XX:+PrintFlagFinal flag shows MaxHeapSize := 0 when heap size is a multiple of 4 GiB as follows.

C:\>java -XX:+PrintFlagsFinal -Xmx4g -version | findstr MaxHeapSize
    uintx MaxHeapSize                              := 0                                   {product}
    uintx ShenandoahSoftMaxHeapSize                 = 0                                   {manageable}
openjdk version "1.8.0_322"
OpenJDK Runtime Environment (build 1.8.0_322-b06)
OpenJDK 64-Bit Server VM (build 25.322-b06, mixed mode)