[River on Summoner's Rift] - Both Baron and Drag rivers are black

Was playing my first match on PBE and noticed both the river at Baron and Drag were pure black. The color is not effected on the minimap. Repro steps: 1.Join game 2.Go to rivers Attached below are two screenshots of the bug. One at Baron and the other at Drag. Thank you. xShigekix
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