Why do Odoo pages break or load slowly after theme or template changes?

[Vihan Richard]

Odoo pages usually break or load slowly after theme or template changes because of conflicting CSS/JS assets, incorrect QWeb inheritance, or outdated modules. During Odoo Theme Development and Odoo Template Development, even a small XML error or missing dependency can disrupt layouts or slow rendering. Reviewing overridden views, cleaning assets, and testing each edit helps prevent these issues and keeps your Odoo website stable and responsive.