Known issue: "write error: Cannot read properties of undefined"

There's a known issue which may happen for some users during scene transitions -- the message "Warning: write error: Cannot read properties of undefined (reading 'transaction')" will appear at the top of the playable area. It does not prevent game play from proceeding but may be annoying. To get around the issue, try using an updated Edge browser to play. If you still run into the issue, feel free to share your system specs in a comment below. 

I believe this issue has to do with the Web GL compatibility of the transitions used, but I haven't had a chance to narrow it down further as I am not able to reproduce the problem myself. Thankfully only a small set of users seem to run into the problem.