I am a bit late to the party, but I found a """solution""" to this problem.
If you finish your own adventure lab, you will get all of the locations as "finds" on your account, and the whole adventure lab will be marked as "completed". Afterwards, you can go to https://labs.geocaching.com/logs/ and delete your logs, reducing the finds number on your account back to the original value. However, the adventure lab itself will still remain in a "completed" state, meaning you can filter it out with that filter if you want to.
This is a hacky workaround, but I found it useful since I pretty much always filter out completed adventure labs.