A bug in the scalable parentheses of math

My trouble is that scalable parentheses of matrices, used in linear algebra, worked perfectly in LibreOffice Math until the advent of LibreOfffice 7 and later versions (up to version 24).
Now they do not work properly any more.
If you typed

left [ matrix {
a_11 # a_12 # a_13 # a_14 ##
a_21 # a_22 # a_23 # a_24 ##
a_31 # a_32 # a_33 # a_34 ##
a_41 # a_42 # a_43 # a_44
} right ]

in the equation editor of Libre Office Writer 6, you got a matrix surrounded by square parentheses as expected.
Now in LibreOffice 24 scaled parentheses disappear as soon as you exit the equation editor; only the 16 elements of the matrix are displayed - although scaled parentheses are correctly inserted when you export the document in PDF format.
Clearly it is a bug of LibreOffice Math and/or LibreOffice Writer that needs to be fixed.
Thank you very much for reading

Can’t reproduce under LO 24.8.6.2, Fedora 41 Linux, KDE Plasma desktop

Even if I add white borders around the formula with 0 cm padding and heavy strokes, this border does not overlay the brackets. There is still some padding between brackets and border.

For better diagnostic, attach your sample file.

No problem using Version: 25.2.3.1 (X86_64) / LibreOffice Community
Build ID: d8d1af5f77df955194e52baabe19324532ac8e8b
CPU threads: 24; OS: Windows 11 X86_64 (10.0 build 26100); UI render: Skia/Vulkan; VCL: win
Locale: de-DE (en_US); UI: en-GB
Calc: CL threaded

brackets

What specific version are you using, and on which OS platform?

When I insert your sample matrix, it displays with brackets as expected, like others have experienced with various other versions. This indicates that the error lies within a specific build, or in your specific system setup.

My system:
LO version: 24.8.6.1 (X86_64) / Build ID: 051bf11303684a0a982c9966e8be766d0a9efbc7
OS: Windows 11 X86_64 (10.0 build 22631)

You can find this info for your system in the help menu, the bottom item “about LibreOffice”.