call hierarchy does not find callers (but it should)

Environment

• Operating System: macos 12.0.1
• JDK version: 11
• Visual Studio Code version: 1.62.2
• Java extension version: java extension pack v0.18.6

Steps To Reproduce

I have created a public repo so that the issue is easily reproducible:

step1: clone this repo:

git clone https://github.com/clembo590/issues.git --branch vscode-java/issues/2219

step2: run mvn clean install

step 3: "import the project in vscode"
open MyCustomizer.java and select the method called customize
make a right click and select Show call hierarchy
Vscode should (and do) find a method (see screenshot)

step 4: open pom.xml and uncomment the dependency:

step 5:
open MyCustomizer.java and select the method called customize
make a right click and select Show call hierarchy
--> VSCODE does not find any calls to this method: that is an error! vscode should find the same call hierarchy as on step 3 (IntelliJ shows correctly the call hierarchy)