Numeric Input Overflow: long numbers in block fields stretch across the editor and lock the UI (Scratch Desktop 3.29.1 / Windows) #9929

Entering an extremely long integer into any numeric input (e.g. the x field of go to x: ( ) y: ( )) causes the blue input bubble to grow horizontally without limit.
The bubble draws a solid line of digits that cuts through the code area, stage, and sprite pane; pointer focus becomes unreliable and the editor is effectively unusable until the offending block is deleted or the project closed.

Expected Behavior

Numeric input widgets should have a maximum width.
If the entered value exceeds that width it should scroll, truncate, or switch to scientific notation—without resizing the entire block or other UI panels.

Actual Behavior

• The input bubble expands across the full workspace, pushing UI elements out of place.
• Mouse clicks often register on the stretched input instead of the intended target.
• Editor interaction is effectively frozen until the block is removed.

Steps to Reproduce

1. Open Scratch Desktop 3.29.1 on Windows.
2. Drag go to x: ( ) y: ( ) (or any numeric-input block) into the code area.
3. Click the x input; paste a very long integer, e.g. 100000000000000000000000000000000000000000000000000
4. Observe the workspace: a horizontal bar of digits now spans the entire UI and blocks interaction.

System Details

• App: Scratch Desktop 3.29.1 (64-bit)
• OS: Windows 11 Pro 23H2 (also reproduced on Windows 10 22H2)
• Display: 1920 × 1080 @ 100 % scaling
• No Scratch Add-ons or extensions enabled

Screenshots