Glitch editor sync error when reopening the page

When I close the editor page on glitch, and reopen it using CTRL + SHIFT + T in chrome:
I can type about 10 characters in the editor before the cursor starts moving all over the place and then I can’t type anything else.
After I refresh the page, the text I typed is moved around usually to the first or last lines of the file.
This is an error that happens a lot and it gets annoying trying to figure out where it put my text I typed.

Windows 7 - Chrome (latest)