Little Light is an inventory manager/companion app for Destiny 2 for both iOS and Android. It helps guardians move their gear and track their ingame progress.
I think that one is fixed, but not sure as I don't have any adept weapons (yeah I'm a noob)
If you find it happening again on the next release, please re-open
when you hold to see a preview of the adept weapons they occupy a very large space on display comparing to any other weapon