The title attribute for font size used to be on the first child of the button. This was simplified in [1] to be on the button instead. However, having the title on the child rather than the button was actually intential because Bootstrap 5 only allows to instantiate one component by node, as specified by [2] which did move the title attribute from the button to the child in the first place. task-3253081 [1]: https://github.com/odoo/odoo/commit/e095e62f4af96d14943ebbe5f0da57c897bd44 [2]: https://github.com/odoo/odoo/commit/09b720eff1a7378351e04661d3df1c3be31ee965 closes odoo/odoo#117263 X-original-commit: 9bd380da016db949eaa0f6453a14a24ffaf61928 Signed-off-by: David Monjoie (dmo) <dmo@odoo.com> Signed-off-by: Antoine Guenet (age) <age@odoo.com>