Seeing a lot of errors due to shadows

[orta]

Looks related to https://github.com/artsy/emission/pull/1178

2018-09-25 16:30:41.017 [warn][tid:main][RCTView.m:714] (ADVICE) View #475 of type RCTView has a shadow set but cannot calculate shadow efficiently. Consider setting a background color to fix this, or apply the shadow to a more specific component.
2018-09-25 16:30:41.018 [warn][tid:main][RCTView.m:714] (ADVICE) View #457 of type RCTView has a shadow set but cannot calculate shadow efficiently. Consider setting a background color to fix this, or apply the shadow to a more specific component.
2018-09-25 16:30:41.019 [warn][tid:main][RCTView.m:714] (ADVICE) View #439 of type RCTView has a shadow set but cannot calculate shadow efficiently. Consider setting a background color to fix this, or apply the shadow to a more specific component.
2018-09-25 16:30:41.020 [warn][tid:main][RCTView.m:714] (ADVICE) View #422 of type RCTView has a shadow set but cannot calculate shadow efficiently. Consider setting a background color to fix this, or apply the shadow to a more specific component.
2018-09-25 16:30:41.020 [warn][tid:main][RCTView.m:714] (ADVICE) View #404 of type RCTView has a shadow set but cannot calculate shadow efficiently. Consider setting a background color to fix this, or apply the shadow to a more specific component.
2018-09-25 16:30:41.021 [warn][tid:main][RCTView.m:714] (ADVICE) View #386 of type RCTView has a shadow set but cannot calculate shadow efficiently. Consider setting a background color to fix this, or apply the shadow to a more specific component.