oscwilde

Is this set to Standard in the Menu bar?

Skipped over? Are your note edits visible in the Undo History? If so, click on the appropriate edit and it will revert.

Look at the Transport bar. It should be visible there...but if not, customize it to always display Sample rate. You can also check this in the Project Settings. Fair enough...and pretty cool.

Edit > Undo History (or press Option-Z).

A particular project or every time? If you open Logic, create a new project with a single track, then save this project and close/shut down Logic, do you get the crash log? Make sure that your usual hardware is connected and turned on (Apollo, KK Mk2, etc.)

So are you opening multiple projects simultaneously?

So happy days @DamonNnn? At least now we know how the B+ works....so the next user will have an easier time with it.

Yep....change it to 16 for both in/out....and open Logic and see if wants to create a new device.

Yep noticed this too (and it's odd....but clearly the way the device works). That it wants to create a new MCU device in the Control Surfaces window every time is frustrating/annoying...so not sure how to get around this - but give me/the hive mind here some time to see if there's a way around this. As a test...and this will be a PITA as you need to do it button-by-button....can you go into iMap and change everything to channel 16? Once done - send this to the B+. Note that this "may" break your existing key commands (as the MIDI channel is different)...so you might need to re-assign them (Delete the existing ones). The reasoning behind ^^^^^^^^^ is to see if the "MCP" functionality of the device can be overridden by channelizing. The MCU protocol works on MIDI channel 1....so I'm hoping that Logic won't recognise it as an MCU device if on another channel. This is probably just wishful thinking. 😉 An alternative to channelizing in this way in iMap is to open the MacOS Audio MIDI Setup app.....and in the MIDI Setup window, choosing the "Platform B+" device (double-click it) and seeing what's available. Depending on the driver - you can often specify what MIDI In/Out ports the device can use - so you may be able to "filter" port/channel 1 here. As above...not sure this will make a difference....and it "may" break your existing Logic key assignments (which are possibly using MIDI channel 1). In the meantime - props to you for sticking with it and delighted that it's doing what you want it to do/fitting in with your workflow.

If it's one project....sounds like it's corrupted. As a question do you ever have multiple projects open at the same time? If so - do NOT do this. There's a known (and long-standing) bug that "can"...not always "will" cause project corruptions when you have more than one open and perform a Save/Save As etc. operation.

Nothing unusual about it although does have MIDI I/O.....do you have anything hooked up via MIDI - keyboard/drum machine etc?

Possibly corrupted key commands - with Save (Project) As assigned to Cmd-S?

Do you own/use an external controller/control surface? If so, the Freeze/Unfreeze command may be being triggered by this?

There's also the Pitch Correction plug-in. https://support.apple.com/en-au/guide/logicpro/lgcef2835dcc/mac

Bizarre. Definitely trash the CS prefs per des's suggestion.