Shortcode "Spoiler" is broken in WordPress 4.0.1

Yep, I have the same error. I hope they fix it real soon.

Hi Everyone,

After updates 4.0.1 wordpres version i getting message in new post “Connection lost. Saving has been disabled until you’re reconnected. We’re backing up this post in your browser, just in case.” and my site is also very slow due to wordpress 4.0.1 updates automatically so, can tell anyone how to resolve this isuue and how to donwgrade 4.0.1 to 4.0 earlier Version please help me thanks

My sites have broke as well! I’m trying to debug what could be happening.

exactly the same problem with spoiler here… Speedy fix would be great!

Since there seems no one to be around from the autor side… here’s a quick workaround I figured out…
Leave the ” in the title away and instead of a space use  
So the above example would be
[_su_spoiler title=Sparplan&mbsp;Check]
regarding the style I’m not sure, because I don’t use it. If it doesn’t work, may it’s a good idea to drop the ” as well, for testing ??

Sorry, I forgot the backticks…
instead of a space use  
So the above example would be
[_su_spoiler title=Sparplan Check]

I have the same problem with my spoilers. Traumawelt’s suggestion didn’t work for me.

In my spoiler titles, only the first set of characters before a space appear on screen, but the contents of the spoiler are all right.

Has anybody worked out how to fix it yet?

Workaround/fix that I can confirm for working:

For the opening part of the sub-spoiler, delete the ‘_’

Example of broken:

[su_spoiler title="Click me to see nested spoilers" style="fancy"]
  [_su_spoiler title="Spoiler title"] Spoiler content [_/su_spoiler]
  [_su_spoiler title="Spoiler title"] Spoiler content [_/su_spoiler]
  [_su_spoiler title="Spoiler title"] Spoiler content [_/su_spoiler]
[/su_spoiler]

Example of fixed:

[su_spoiler title="Click me to see nested spoilers" style="fancy"]
  [su_spoiler title="Spoiler title"] Spoiler content [_/su_spoiler]
  [su_spoiler title="Spoiler title"] Spoiler content [_/su_spoiler]
  [su_spoiler title="Spoiler title"] Spoiler content [_/su_spoiler]
[/su_spoiler]

That workaround looks like a good idea, however, I do have about 280 subpages with broken sub spoilers. I don’t want to change all of them manually.

Would be great to get some kind of feedback from the Plugins author on whether they’re already working on an update?