It's certainly outside-possible that a fixpack could initiate a crash.
However, it's happening too often. Your local databases are likely corrupted, and that's why it's happening every day.
To fix this, you'd need to either run nfixup on your local databases, or set up Notes re-create them (second choice results in losing the configuration they contain).
You may also need to compact your local databases. They last a long time without compact, but eventually they need the cleanup.
Local databases can get corrupted when someone does something improper with them. Notes generally shuts itself down smoothly. But if there's an occasion where Notes is not allowed and/or it crashes under some other circumstance, databases can get corrupted. Fixup normally resolves those issues, and Notes normally runs fixup on any databases not shut down properly. Fixup can be thwarted though, if there are repeated crashes, or if someone annoyedly crashes Notes, thinking Notes is taking too long to load (when it's just trying to fix itself from the last crash).
There are plenty of other things you can do to slam Notes around. Task Manager processes like "nevent" and "ntaskldr", along with "nnotes2" and "nlnotes", are probably responsible for your shared-memory dialog, and you can kill them from Task Manager. But whenever you bring down "nlnotes", the basic suite of databases below are at risk. As well as anything else you had open, locally.
If you restart Notes and allow it to restart completely, then shut down completely, then Notes will have dealt with any problem caused by the prior crash. But prior crashes, especially multiple crashes, can leave databases in limbo.
If you don't get a handle on the database corruption, you'll continue to crash Notes, and eventually a database will be corrupted beyond repair.
Then you really will have to reinstall.
Databases to fixup:
bookmark.nsf
desktop8.ndk
names.nsf
Local mail DB if you have one (and this'll probably take a long time).
Any database you know you're crashing "often".