I wonder if it is still impossible to toggle checkboxes on/off in rapid succession without crashing the page. We discontinued using Confluence partly because of this issue in 2019, and just out of curiosity I just checked the ticket again now - closed in 2021 not because it was fixed, but because "we are closing this bug to focus on our upcoming roadmap for all Confluence users."[0]

That seems to be endorsing the exact behavior some users are complaining about with regards to Notion in this thread, leaving so many bugs unresolved while pushing new features.

[0]https://jira.atlassian.com/browse/CONFCLOUD-56972