Collapsiblock not working in Sidr

I believe this might happen if you don't enable the "Disable duplicates" option. Without disabling duplicates, Sidr creates a clone of the original elements and puts them in the Sidr panel. These clones don't have any events attached to them. If you want the events to be attached, you will have to do something like this:

1. Create a hidden DIV or region (say, left-panel) that contains the markup/blocks that you want in your Sidr
2. Set up a Sidr trigger block that takes content from the above region, say, .region-left-panel
3. Finally, in the advanced settings, check the box that says "Disable duplicates".

This should preserve the event listeners attached to the original element. Since this issue is very old, I'm closing it as outdated. If you're still facing it, feel free to reopen it.