No Code completions anymore?

I'm hesitant to post this as issues like this tend to be a misconfig somewhere...

I'm no longer getting any code completions at all from MapStruct. I initially thought this was because we used records almost exclusively everywhere, but now I tried to create a simple POJO and that offers no code completions for @Mapping either.

Eclipse 2023-09, MapStruct Tools 0.1.0.201701192129. The error log seems clear. Enabling or disabling "Enable non-blocking completions" makes no difference.

Example code:

@Mapper
public interface AhaMapper {
    @Mapping(target = "name", source = "name2")
    Aha fromDto2(Aha2 ahaaa);
}

public static class Aha {
    private final String name;

    public Aha(String name) {
        this.name = name;
    }

    public String getName() { return name; }
}

public static class Aha2 {
    private final String name2;

    public Aha2(String name2) {
        this.name2 = name2;
    }

    public String getName2() { return name2; }
}

No repository files, tests, or entry points are named. Reproduce the example in Eclipse 2023-09 with MapStruct Tools 0.1.0.201701192129, inspect the reported error log, and compare completion behavior with non-blocking completions enabled and disabled. Done means @Mapping code completions work for the supplied mapper example.