BACKGROUND
Been using the same Custom Workflow for a long time to generate a Notebook and Notes for each week of Sunday School Bible Study teaching preparation. No issues with it for a year plus.
Decided to just work on an iPad last night and this morning. Added a bunch of C-n-P's to a Note within a Notebook, along with a bunch of highlighting and Font Formatting.
Go to PC desktop this afternoon and that note cannot be touched, changed, edited without crashing Logos (running Logos Pro (early) & version 35). Go back to the iPad, no issues. Copy the contents of that note on the iPad and paste into a new note on the iPad. No issues working with it on the iPad. The new note is disconnected from the Workflow, but no concern, all the hours of work is still in contact.
Go back to PC desktop Logos app and Logos crashes with trying to do anything with either of the notes.
Go back to iPad, copy note contents from the note again. Put that into ASCII email to strip all the background stuff from behind the scenes. Lose all highlighting and formatting within the note, but the content is there.
Back to the PC desktop version. Create new entry in the Workflow, paste the email contents into the newly created Workflow/Notebook/Note and life's wonderful again. Lacking the hours of highlighting and formatting, of course always faster the 2nd time 
Only connection I can make is Logos desktop looked to be updating to 35.0.520 when it was opened. But, shouldn't the note created on the iPad be secure on a Logos cloud server? I usually close Logos on the desktop, as was the case today so that when it reopens the layout configuration it is pulling from the cloud. The iPad is hit and miss, usually close the Logos app when done, not the case this am. But don't all the app synch to the cloud as devices are closed? My iPad is not shut down, only closed, & still powered until it finishes what it was doing in the background.
My time savings redo work thru will be to have the damaged note in side-by-side panels with the now good one. Can still scroll the damaged one, and then highlighted & formatted items, so it'll be much less than half the original time spent 

Any insights why this happened or advise how to prevent it? I tried every trick I knew...