Replacing all Chrome bookmarks runs forever

For the last month or two, trying to replace all Chrome bookmarks from the server just runs forever.  A lot of the bookmarks appear to update but it just hangs before they're all updated.  I've let it run for many hours (overnight for example) and also have tried it with all add-ons/extensions disabled.  This is a Windows 7 machine.  I primarily use Firefox, which is sync'ing fine but periodically I use Chrome for work and I usually just update all bookmarks from the server.  I did this for years with no issues.  I have a lot of bookmarks (over 72,000).