Yes it is likely to be fixed.
Usually when new versions of softwares released there are bugs.
So it is appropriate to wait for a few months before you upgrade so that bugs that are detected can be fixed until it is a bit stable.
You can also follow or post in the official GitHub issues page for help as well using the link below
Sorry to reopen this but this still seems to be an issue I downgraded to 13.5.4 i’ve even tried downgrading to 13.3 and at first it seems to work but after a few visits I get the wall of jumbled text screen again. It doesn’t happen every time page loads but happens enough for it to be a problem.
There could be so many reasons why you get a wall of jumbled text on screen.
I suggest you create a very minimal version of your site and deploy to see if the problem exits in order to narrow down the problem and then build your way up.