Error with syntax file

[normallywho]

Ever since upgrading to SublimeText 3 3176 I've been getting an error every time I load ST:

"Error loading syntax file "Packages/PlainNotes/Notes.sublime-syntax": Apparent recursion within a with_prototype action: 25000 context sanity limit hit"

Sometimes it's just the one error on startup, but sometimes I get dozens of these modals that I have to click OK through before I can start using ST.

Additionally, there is no longer any Markdown syntax highlighting on any of my notes.