When consulting the chest , it is possible to have the window locked: it is impossible to close it by clicking on 'X'
Step to reproduce:
1) Talk to Mohabi
2) Click on your stash without closing the exchange with Mohabi
-> You see the stash without having you inventory open, the window is locked.
To close it, reopen your stash.
Video here:
https://youtu.be/BT5NMT4DHFk