This bug should have been fixed in the OneNote for Windows 10 October 2017 update. Please check your existing pages and let us know if you still experience any problems.

PS: The link you posted is dead.

Thank you for all your comments and feedback in helping us make OneNote better for everyone to use.

For a list of features added to OneNote for Windows 10 please visit the following article

https://support.office.com/en-us/article/What-s-new-in-OneNote-for-Windows-10-1477d5de-f4fd-4943-b18a-ff17091161ea