Sometimes MCreator screen doesn't load.

Status
Can not reproduce
Issue description

When i open MCreator, appears the loading screen, but sometimes happens that then appears a white screen in MCreator window (as you can se in the screenshot below), but the program still working, it doesn't crash. I try to restart MCreator but nothing. After a few minutes, evrything goes back to normal. I don't know how to fix this. I am using 2020.2 version of MCreator.

Issue comments

When this happens, leave it open, go to <user home>/.mcreator/logs and paste contents of mcreator.log here (in this ticket). Thanks!

[main/INFO] [Launcher] Starting MCreator 2020.2.14217 - 202000214217
[main/INFO] [Launcher] Java version: 1.8.0_232, specification: 1.8, VM name: OpenJDK 64-Bit Server VM
[main/INFO] [Launcher] Current JAVA_HOME for running instance: C:\Program Files\Pylo\MCreator\jdk\jre
[main/DEBUG] [Preferences Manager] Loading preferences from C:\Users\...\.mcreator\preferences
[main/INFO] [Launcher] Installation path: C:\Program Files\Pylo\MCreator
[main/INFO] [Launcher] User home of MCreator: C:\Users\...\.mcreator\
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added stepsounds datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added damagesources datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added biomes datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added potions datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added biomedictionarytypes datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added mapcolors datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added achievements datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added particles datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added blocksitems datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added keybuttons datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added sounds datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added tabs datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added enhancements datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added entities datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added gamemodes datamap to cache
[AWT-EventQueue-0/DEBUG] [Data List Loader] Added materials datamap to cache
[AWT-EventQueue-0/INFO] [Plugin Loader] Loading plugin: core from .\plugins\mcreator-core.zip
[AWT-EventQueue-0/INFO] [Plugin Loader] Loading plugin: generator-1.12.2 from .\plugins\generator-1.12.2.zip
[AWT-EventQueue-0/INFO] [Plugin Loader] Loading plugin: generator-1.14.4 from .\plugins\generator-1.14.4.zip
[AWT-EventQueue-0/INFO] [Plugin Loader] Loading plugin: generator-datapack-1.14.x from .\plugins\generator-datapack-1.14.x.zip
[AWT-EventQueue-0/INFO] [Plugin Loader] Loading plugin: generator-datapack-1.15.x from .\plugins\generator-datapack-1.15.x.zip
[AWT-EventQueue-0/INFO] [Application] Loading generator: 1.12.2/generator.yaml
[AWT-EventQueue-0/INFO] [Application] Loading generator: 1.14.4/generator.yaml
[AWT-EventQueue-0/INFO] [Application] Loading generator: datapack-1.14.x/generator.yaml
[AWT-EventQueue-0/INFO] [Application] Loading generator: datapack-1.15.x/generator.yaml
[Thread-11/INFO] [GA] Tracking page: /2020.2/launch
 

Here it is! (For privacy i censored my user folder name and the time of all the process).

Ok i solved the problem. When it happens, you have to extend to full screen the MCreator's window, and the screen will appear. 

I thought i had resolved the problem, but it still happens. Help me, please?

Ok i finally solved the problem. In the options, while you activate the 2d OpenGL acceleration, UI doesn't load, so go to <user home>/.mcreator/preferences then open the file by a noteblock, then write this <use2DAcceleration": false> (before was <"use2DAcceleration": true>). This is a bug wich i hope will be fixed.