Usually, in address bar I type only 3 letter then I press enter without looking because Opera always picks the website I want, except for Google Translate. I type "tra" and instead of "translate.google.com" I get "track-china-post/" which is some parcel monitor website.

I never visited that website. I even cleaned my browser history, nevertheless I always get track-china-post for "tra". That so frustrating, because I always visit that website by mistake. How to stop it?

Same here. It's really annoying!

Opera 65.0.3467.72
macOS Mojave 10.14.6

macOS Mojave 10.14.4
Opera 62.0.3331.66

still happening!!!

@jimunderscorep yes
"Allow sites to save and read cookie data" - is activated
"Keep local data only until you quit your browser" - is deactivated

I get signed out of Opera Synchronization not just all websites I visited. Today it happened twice. I didn't even force closed the browser.

It happened on Ubuntu 16 .. if it matters.

Sometimes when I reopen Opera I'm signed out of my account and every website settings is set to default.
Version: 60.0.3255.170