When combining these two potion effects, the entire game (besides the sun, moon, and night sky) to turn completely black. This persists when the world is saved and quit and in the main menu.
The screenshots attached show the effect in chat (text unreadable and highlighted to show a white bar), the effect in the creative menu, and the text being black on the main menu.
Thank you for your report!
We're actually already tracking this issue in MC-165208, so I resolved and linked this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
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