I have found this to be problematic, too. It is the one thing that nudges me back to using Safari instead of Chrome for OSX. The solution that I've decided to use - at least for now - is to purchase TextExpander, which is a system-wide text shortcut solution.
While it does have significant advantages over the native text shortcuts there are some drawbacks as well. For example, if I decide to delete the shortcuts in the System Preferences pane in order to avoid conflicts it will also delete them on my iOS devices, which is an undesirable effect for me.
Perhaps @sdayal can tell me if his tip about enabling the text expansion will work in reverse and, in fact, if it is also available for other applications. For example, could I use the following terminal command:
defaults write -g WebAutomaticTextReplacementEnabled -bool false
to disable the text shortcuts in Safari? Moreover, are the equivalent commands for other apps, such as Mail, that I could use? For example, would it be appropriate to use:
defaults write -g MailAutomaticTextReplacementEnabled -bool false
Thank you in advance for any assistance. Turning off these shortcuts has been a vexing problem for me.