When f11 or the option in settings is used, the maximize window option becomes unavailable.
MC-81648
Cant maximise window
Resolved
Duplicate
0
Charlie Franzke
(Unassigned)
Unconfirmed
Minecraft 1.8.7
Retrieved
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-68754. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.