Describe the issue

There is a positioning conflict between the autocompletion tooltip and EditorView.scrollMargins. When typing a character (e.g. 'f') at the very beginning of a document, the autocomplete menu is initialized but remains invisible.

Testcase:

• https://krpano.com/codemirror/bugs/scrollmargins-and-tooltips.html
• a sandbox example is also included below

Steps to Reproduce:

• Use EditorView.scrollMargins with a significant margin (e.g. 100px).
• Start with an empty JavaScript document.
• Type a single character (like 'f') in the first line.
• The cursor becomes "trapped" (arrow up/down keys stop working) because the autocomplete keymap is active, but the menu is positioned far off-screen.

Expected Behavior:

• The tooltip should be positioned correctly at the cursor, even if the cursor is within the defined scrollMargins.

Observed Behavior:

• The tooltip is invisible (css top position of -10000px).
• The cursor is trapped, up/down keys do not to work.
• Pressing ESC closes the invisible menu and restores normal cursor movement.
• Occurs when scrollMargins are larger than the distance from the cursor to the editor edge.

Environment:

• CodeMirror 6
• @codemirror/view (latest)
• @codemirror/autocomplete (latest)

Browser and platform

No response

Reproduction link

https://codemirror.net/try/#c=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