Thank you, I'll have a look at why the key does not have a description, too.
BTW, I found a way to circumvent the issue, but in the meanwhile, I could find that the problem came from a bug in the z88dk compiler: I could discuss about it in the forum and the issue was very swiftly corrected: https://z88dk.org/forum/viewtopic.php?f=12&t=12036&sid=152214e79554d4caa873a5568a386e89