Engineers cache bug?
Most likely this https://forum-en.gw2archive.eu/forum/support/bugs/Got-100-map-completion-on-VB-no-reward
Characters with 100% core tyria map completion aren’t getting map completion rewards. If you really really need to have it done now and have another engineer alt who doesn’t have map completion in core tyria then you can do it with that character. Else you’ll have to wait for ANet to fix it.
Ah great, so I will be credited at some time. Cheers, bud!