Multiple Calendar issues on macOS 26 Tahoe

There seem to be multiple issues with Calendar on macOS Tahoe v26 and the same issues apply to v26.1

I’m on MacBook Pro 16” 2021, all software on my machine is updated.

Most severe to less severe...

1) sometimes an entry disappears if you drag it to a new day ie from Mon @ 2pm to Tue @ 2pm or the entry will appear in the next week at time like 4:30 or it just disappears

2) when Calendar is launched Settings > General “Show __ hours at a time” always defaults to 7 hrs even though it’s set to 10 hr, I have to change it from 10 hrs to another time like 9 hrs & it then changes the calendar but once Calendar is closed and opens again it defaults back to 7 hrs

3) I use my Calendar to usually show a week at a time (7 days starting on Sun), when I hit the forward arrow sometimes the arrow doesn’t respond, sometimes it does. Sometimes it only advances the Calendar 6 days not the full 7 days.

Bottom line is Calendar is way too buggy and it’s disappointing that the OS26 version of it is riddled with issues. I know you had a Search issue originally (I don’t know if I had that issue) but I’d really like to see the problems addressed asap, it’s a tool I use daily.

[Re-Titled by Moderator]

Original Title: Calendar Issues Tahoe v26