We are using PostgreSQL with database sessions and are experiencing the following navigation issues:

Clicking Start on the welcome screen sometimes experiences - "We are sorry but your session has expired."

While in a survey clicking next can produce any number of results.
sometimes it goes back to the welcome page
sometimes it goes back to the previous page
sometimes it jumps to a random previously completed page
sometimes it throws " Please use the survey navigation buttons or index. It appears you attempted to use the browser back button to re-submit a page."

Have also experienced CSRF token could not be verified. .

Occasionally it will let you get a few screens in before problems start. In about 10 attempts I was able to complete 1 survey.

Tried multiple browsers in and out of private/incognito modes. Clearing data and Cache seems to have no effect.

Happens across all my surveys, with or without custom templates