White Invisible Text while edit doc

Hello.

I built android version and can open any file.

But the problem is that the text is white and invisible.
I checked the Font, Bold, Italic, and etc, but still invisible.

When I open powerpoint(.odt) file and click play button, I can see the texts.
but invisible while edit.

I checked this issue and built with version 6-4, but still got same issue.
https://forum.collaboraonline.com/t/android-app-invisible-text-issue/73

Is it a css issue?

I checked AndroidStudio Log and I got this.

D/LOActivity: postMobileMessage: commandvalues command=.uno:LanguageStatus
D/loolwsd: DBG Mobile-23176 2021-05-04 14:40:23.662366 [ JavaBridge ] DBG  From JS: lool: commandvalues command=.uno:LanguageStatus| /home/sic/Downloads/online-android/android/lib/src/main/cpp/androidapp.cpp:195
D/loolwsd: ERR Mobile-23178 2021-05-04 14:40:23.663865 [ docbroker_001 ] ERR  Could not open .uno:LanguageStatus| /home/sic/Downloads/online-android/wsd/TileCache.cpp:252
D/LOActivity: postMobileMessage: commandvalues command=.uno:ViewAnnotations
D/loolwsd: DBG Mobile-23176 2021-05-04 14:40:23.666670 [ JavaBridge ] DBG  From JS: lool: commandvalues command=.uno:ViewAnnotations| /home/sic/Downloads/online-android/android/lib/src/main/cpp/androidapp.cpp:195
D/loolwsd: ERR Mobile-23178 2021-05-04 14:40:23.667802 [ docbroker_001 ] ERR  Could not open .uno:ViewAnnotations| /home/sic/Downloads/online-android/wsd/TileCache.cpp:252
D/LOActivity: postMobileMessage: commandvalues command=.uno:StyleApply
D/loolwsd: DBG Mobile-23176 2021-05-04 14:40:23.670853 [ JavaBridge ] DBG  From JS: lool: commandvalues command=.uno:StyleApply| /home/sic/Downloads/online-android/android/lib/src/main/cpp/androidapp.cpp:195
D/loolwsd: ERR Mobile-23178 2021-05-04 14:40:23.672005 [ docbroker_001 ] ERR  Could not open .uno:StyleApply| /home/sic/Downloads/online-android/wsd/TileCache.cpp:252
D/LOActivity: postMobileMessage: commandvalues command=.uno:CharFontName
D/loolwsd: DBG Mobile-23176 2021-05-04 14:40:23.675078 [ JavaBridge ] DBG  From JS: lool: commandvalues command=.uno:CharFontName| /home/sic/Downloads/online-android/android/lib/src/main/cpp/androidapp.cpp:195
D/loolwsd: ERR Mobile-23178 2021-05-04 14:40:23.676172 [ docbroker_001 ] ERR  Could not open .uno:CharFontName| /home/sic/Downloads/online-android/wsd/TileCache.cpp:252

Thank you.
Damir.

Hello.

I tested like below and I can see the text while edit.

I extract .so files from the Collabora Office APK I downloaded from APKPure(PlayStore).
And I replaced .so files to my APK by apktool
As a result, I can see the texts.

The difference is version.
PlayStore APK is 6-4-3 and I cloned distro/collabora/6-4
Looks like I cloned 6-4-8 or 9.

I used NDK 20.1.5948944.

Please tell me about version

Thank you.
Damir.

I think the public source code for android may be different from real source code of playstore apk.

Right, mentors?

Thanks,
Charles.