Bug report: add html or text between placeholders creates 404 Not found.

I’ve replicated this bug a number of times on my development site.
Page uses [events_list scope=”future”] and placeholders to list events by date and location.

When adding in the code editor then Updating – View Page: the page is 404 not found. https://newsite.satisfice.com/indexphp/test2/

So I create a new page and paste the edit in. It’s Ok. https://newsite.satisfice.com/index.php/test/
Just what a wanted.

I tried again, this time adding a comma between the #_LOCATIONTOWN, #_LOCATIONCOUNTRY
Same response. 404 Not Found when viewing the page.

I tried again, I create a new page and paste the edit in, this time adding a (return) or carriage break between the
#_EVENTLINK
<——like this, by hitting return—->
[/events_list]
Same response. 404 Not Found when viewing the page.

Note – each time this happens it blows out the Menu and the page needs to be added to the menu again.

https://newsite.satisfice.com/index.php/schedule/

Here’s the Code now:
[events_list scope=”future”]
Location: #_LOCATIONTOWN, #_LOCATIONCOUNTRY
Name: #_EVENTNAME
#j #M #Y #@_{ \t\o j M Y}
#_EVENTLINK

[/events_list]

The page I need help with: [log in to see the link]