Caching block breaks in combination with stacks (css/js does not load in)

[Yihka]

Hello,

Block caches wrongfully while having $btCacheBlockOutput = true and setting the concrete5 settings to cache everything. It happens when you place a block in a stack and show this to users that are not logged in. When you first visit the page, it shows with the css/js, but on refresh, when it gets it out of the cache, it shows it wrongfully, as the css/js is not loaded in.

How to reproduce?
Make a stack, make a custom block, place custom block in stack, place stack on a page. Refresh twice as a non-logged in user. Make sure the block is only shown once on the page.

Additional info
C5: 5.7.5.8

[Mesuva]

By 'staple', do you mean a 'stack'?

[Yihka]

Yes, I mean stack

[typoman76]

I can confirm this. Happened to a site we are developing in 5.7.5.8

After clearing the cache everything is working fine. And the blocks in a stack are loading their view.css. After some time when we revisit the page the view.css didn't load and blocks are unstyled.
I will check if this happens after the 6 hours when the cache should renew.
If i manually delete the files /tmp /cache in the files directory the same issue appears.

[typoman76]

Happened on a second site.
We had tonmove the css to the theme.

[Yihka]

Yes it is a good temporary solution by putting it in the theme CSS but of course it's not right. CSS/JS should load depending on whether a page contains a block or not, to prevent pages from containing too much css/js that's not used.

[aembler]

Can you post a block that exhibits this behavior? Is this block in the application directory and manually installed, or is it part of a package?