[Fern]

First screenshot: If you're enchanted and pop off the Lantern Bearer auras, you can block people from being visible. Tested with Galren and Rebia's aura. Seems to happen because of the glow effect.

Second screenshot: I have no idea why it happens exactly, but it has a chance of randomly taking place. Tested in PVP Spar mode. The field fills up with black spots and the battlefield tiles do not appear.

[Neus]

The first one should be corrected, the second one needs more details.