The game lags when navigating through inventories and menus while playing in windowed mode. This bug has been happening on my device since 1.21.6 without mods, and also in both release candidates for the upcoming 1.21.7.
After disabling the option Menu Background Blur, the problem stopped happening for a few minutes, but it started lagging again, so it doesn’t look like it is related to that option. This bug doesn’t happen while playing in full-screen mode.
Steps to reproduce:
Join a world and open an inventory or menu.
Change the Menu Background Blur option and see if the lag happens.
If you experience any lag, switch to full-screen mode and see if the lag stops.
Additional info:
Although I listed those steps, it doesn’t seem to happen on every device. My PC drivers are up-to-date, though. Just in case, my PC has an AMD Ryzen 5 5600X 6-Core Processor and an NVIDIA GeForce RTX 3050. I’m using Windows 11 in the stable release.
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We do not have enough information to find the cause of this issue.
While the lag occurs, please press F3 + L once, then wait a short moment until profiling has finished.
Afterwards, please attach the generated .zip file containing the profiling results here. The file path is shown in chat; the file can be found in minecraft/debug/profiling/<DATE>.zip.
If you are playing on a server please additionally run the command /perf start to create a profiling report for the server. In case you do not have the permission to run this command, make sure that you're a server operator.
Once profiling has finished, please attach the generated .zip file from debug/profiling/<DATE>.zip of the server folder.
This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
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Just tested on 1.21.8-rc1 and this bug is still happening.
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