Hi, there is a bug with swaping styles in dbseo 2.0.43, thats the default vbulletin behavior:
And thats with dbseo 2.0.43 enabled(no others plugins, no cache):
You can check in forums with dbseo:
https://www.foro3d.com/
And here without:
https://foro.noticias3d.com/vbulletin/forum.php