UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Steps to reproduce the problem:
There are no steps to systematically reproduce the issue.

Here's what I did and what happened

1. Right after booting, I started Chrome and I got no error message of any kind
2. I tried to navigate to a few sites that I am usually always logged in, including Google, Facebook, and a couple more
3. I observed that I was unexpectedly logged out of most of them, as if my cookies had been deleted (which I hadn't), but not all. As far as I can tell, I was logged out of all https sites that I tried, but I was still logged in on the one that I tried that is plain http
4. I closed Chrome
5. I reopened Chrome, and I got an error message saying that there were troubles loading my profile (this happens almost systematically when I close Chrome and reopen it "quickly enough", isn't that pathetic?)
6. I closed Chrome, this time waited a little more, and reopen it, and got the profile error again.
7. I closed Chrome, and from a terminal, I ran "ps aux | grep chrome"

What is the expected behavior?
None of this should have happened starting from step 3. Anyway, at this point, after step 7, there should be no Chrome process running, obviously

What went wrong?
Pretty much everything.
Anyway, at step 7, there were a bunch of processes running with "chrome" in the executable path

So, I killed one of them. As a result, all of them "died".
After that, I could start Chrome normally and NOW everything was working as expected.

Did this work before? N/A 

Chrome version: 65.0.3325.181  Channel: stable
OS Version: 
Flash Version: 

unbelievable