I've found the same problem when updating a clients' site not being updated for a year. When I worked on it a year ago everything was fine. So the issue must have occured last year between April and November, as it seems.
A little strange it's so hard to solve since it once was working. I will put the js snippets in the content templates until further notice. But I expect a real solution
And why isn't it put under the "Known issues" section?
Hello. Thank you for contacting the Toolset support.
I checked internal ticket and I do not have anything to update you. The only thing I can do it raise your voice to the internal ticket we have and will make sure to add errata page for this.
Will update you once we have errata page published under "Known issues".