Tooltips do not show up until the page is refreshed

[dufipl]

📝 Provide detailed reproduction steps (if any)

1. Build GH Writer on ghw/epic/388-version-3521-bump branch
2. Try to open a new issue.
3. Hover toolbar buttons, if tooltips show up, go to the issue list and try to create the issue again.

✔️ Expected result

Tooltips show up regardless of the cache.

❌ Actual result

Tooltips do not show up until the page is refreshed

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[mlewand]

Interesting, this issue should be in case reproducible in vanilla CKE5 - let's investigate it further.

[Acrophost]

More bugs most likely related to cache (occur when tooltips are not showing up):

In markdown (nostalgia) editing there is no preview or bottom bar for adding files from computer. Hard refresh/clearing cache fixes it just like tooltips 

[mateuszzagorski]

Regarding the tooltips what I see is that inside the ck-body-wrapper we're missing a div with ck ck-balloon-panel ck-balloon-panel_arrow_n ck-balloon-panel_with-arrow ck-tooltip classes.  

In the recently added tooltipManager we have the bodyViewCollection that's set to first( TooltipManager._editors.values() ) and because of that we're targeting the editor that's no longer visible but it is still available via the TooltipManager._editors.values().  

So in my opinion we have to update the ckeditor5-ui plugin in order to fix the issue.

You can replicate the similar behavior in ckeditor5:
- use the all-types manual test
- destroy the ClassicEditor
Without it tooltips will no longer be visible in all the other editors.

Additional notes:
- Clearing up the TooltipManager._editors set seems to fix the issue for GitHub Writer - but it does not work well for ckeditor5 itself so it needs to be investigated further at the source.

[Dumluregn]

I agree with @mateuszzagorski 's conclusions. I'll report an upstream issue in CKE5 repo and once it's resolved, we should go back here to ensure it fixed Writer.

[Dumluregn]

Reported in ckeditor/ckeditor5#12602.

[mlewand]

Closing as an upstream issue.

[dufipl]

@mlewand As the upstream issue is closed, I assume it should be fixed, but it's not, therefore I will reopen the issue.

Updating branch in reproduction steps to ghw/epic/388-version-3521-bump.

[mlewand]

This should be fixed with #417.