ok so highlighting has been working perfectly for me up until now.
But then I added a custom highlight style in L6 and I turned labeling on and a prompt to add a label when that highlight style is used. Here's a picture for those who don't know what I'm talking about:

Well this new highlight style worked well in L6 but then I noticed that when I tried to sync it to mobile, the sync icon in L6 had a red exclamation point in it and it said "there was an error syncing your highlights" or something like that. So I deleted the custom highlight and restarted L6 and then the exclamation point went away and all seemed to be back to normal...
Well now the iOS app highlighting feature is completely broken. It seems to be syncing any highlight changes from L6 but if I try to add any new highlights from the iOS app, the app crashes.
I use highlighting every day on my iOS apps so I really need to get this fixed ASAP! Anyone?