Copy paste issue in ft=htmldjango

[minusf]

If my diagnosis is correct, I see an issue while copy pasting certain html code into a buffer with ft=htmldjango and vim-matchup plugin enabled.

Steps to reproduce, first correct behaviour with html:

1. nvim t.html
2. set ft=html
3. copy paste html into buffer: <img data-imagebox="g" data-imagebox-src="original_images/01-pf-usm.jpg" height="228" loading="lazy" src="/media/images/01-pf-usm.2e16d0ba.fill-228x228-c50.jpg" width="228" data-imagebox-image-index="0" data-imagebox-gallery-index="0">

Garbled copy paste with htmldjango:

1. nvim t.html
2. set ft=htmldjango
3. copy paste html into buffer: <usm.jpg" height="228" loading="lazy" src="/media/images/01-pf-usm.2e16d0ba.fill-228x228-c50.jpg" width="228" data-imagebox-image-index="0" data-imagebox-gallery-index="0"> img data-imagebox="g" data-imagebox-src="original_images/01-pf-

The result is not always the same, sometimes the garbled text is different.

When I disable andymass/vim-matchup plugin, both scenarios result in same snippet being pasted.

nvim 0.12.1
macos 15.7.6