ERROR: Message queue out of memory. Try increasing 'message_queue_size_kb' in project

[victorbstan]

Godot version:
3.1.1
OS/device including version:
Windows 10
Issue description:
Failed method: LineEdit:_update_callback target ID: 1174274
Failed method: RichTextLabel:_update_callback target ID: 8215
TOTAL BYTES: 1048560
NULL count: 0
CALL : 43687
CALL grab_focus: 1
CALL show_modal: 1
CALL select_all: 1
ERROR: Message queue out of memory. Try increasing 'message_queue_size_kb' in project settings.
At: core/message_queue.cpp:56
Failed method: ToolButton:_update_callback target ID: 8217
TOTAL BYTES: 1048560
NULL count: 0
CALL : 43687
CALL grab_focus: 1
CALL show_modal: 1
CALL select_all: 1
ERROR: Message queue out of memory. Try increasing 'message_queue_size_kb' in project settings.
At: core/message_queue.cpp:56
Failed method: ToolButton:_update_minimum_size target ID: 8217
TOTAL BYTES: 1048560
NULL count: 0
CALL : 43687
CALL grab_focus: 1
CALL show_modal: 1
CALL select_all: 1
Steps to reproduce:
Edit configuration in display, tab between field, should see blocking in UI. And these messages in log.
Minimal reproduction project:

[slapin]

Need code. My Astral Probe tells me you might be doing too much stuff in single frame. Either increase message_queue_size_kb in project settings or don't do what you're doing.

[victorbstan]

I was only editing configuration in engine/editor, wasn't playing or executing the game. It hasn't happened since, but I don't edit project configs very often at all, so I'm not entirely sure how to reproduce.

[jwatte]

This happens quite frequently in very simple projects, especially when using tab to move through size fields in GUI container widgets.
See also: #34592

[akien-mga]

Superseded by #35653.