Trading panel with a chest randomly closed and wont reopen

[Ashe]

d3d11: failed to create buffer (target 0x1 mode 1 size 7356192) [0x8007000E]
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer
d3d11: attempt to lock null buffer

log shows this, this was from the top locker within the chest (non-graffiti’d)