Maybe they can't do annything about it afterall. Because this isn't solved
Blinking User Interface is a glitch that occurs if you stay pressed on a key on your keyboard. (controller hase not been tested)
For example: the inventory Interface starts blinking if you continuously press the key bind. This takes also effect for the function keys as F1 and F5... This is part of a known problem with older versions that has been fixed. But in 1.14 it is happening in ether creative or survival mode.
I was thinking that staying key pressed would "action" only once the desired function. I wasn't expecting a quick succession of opening and closing.
This take effect on lots of version: 1.14 - 1.14.1 - 1.14.2 and also some old versions.
connect to a map or a server (1.14.2 for example)
keep on pressing you inventory key
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Please do not mark unreleased versions as affected.
You don't have access to them yet.
Thank you for your report!
However, this issue is a Duplicate of MC-93437.
Unfortunately, we have no plan of fixing the issue you are referring to. However, feel free to submit your feedback on the official feedback website or on the Minecraft suggestions subreddit.
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As everyone I spent time for something that isn't solve and will not be. Understood, thx
Please do not mark unreleased versions as affected.
You don't have access to them yet.