Steps to replicate the issue (include links if applicable):
- Load enwiki:Earth with device emulation set to a mobile device
- From the Performance tab, apply 4x CPU slowdown and Slow 4G network throttling (for example)
- Reload the page, click section headers to expand some sections before JS modules from the resourceloader are fully loaded
What happens?:
The sections you expanded before JS is loaded collapse, because of the hidden="until-found" attribute is set.
What should have happened instead?:
The sections you expanded before JS is loaded stay expanded, without the hidden attribute.
Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):