When you click Save & Quit in the Pause Menu it lags for a few seconds and then
the "Saving World" screen (with that chest icon) appears for 1-2 Seconds.
This Screen should appear instantly when you clicked the button.
You can see it in this video: https://www.youtube.com/watch?v=-0TYPH5aa9w&feature=youtu.be
Comments 3
Thank you for your report!
However, this issue has been closed as Cannot Reproduce.
We were unable to reproduce the problem you are describing in the latest version.
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This seems to be a commonly reported issue. The GUI within the beta seems to lag in general.