Those tags are deprecate:
https://developer.mozilla.org/en-US/...e-break-inside
Should use:
https://developer.mozilla.org/en-US/...s/break-inside
Though the Libra2 does not recognise the newer tag and still prefers the deprecated tag.
Use both tags in your CSS. Something like this...
.nopagebreak {
break-inside: avoid;
page-break-inside: avoid;
}