alert or confirm makes Scratch Desktop unable to receive input

[apple502j]

Expected Behavior

You can type on input

Actual Behavior

If alert() or confirm() is executed, you cannot type on inputs anymore, until you blur and re-focus the window. This only happens in Scratch Desktop 3.9.0.

Steps to Reproduce

There are three ways to get into this state:

1. Do something (so that opening a project gives warning), open a project, click ok
   • Click load from computer, open a file that is not sb3 (like a txt), and get invalid project alert
   • Disable mic via privacy setting and try to record voice
2. After doing one of them, try editing the sprite info (sprite name) or variable name.
3. You can't type, but can paste.
4. Choose other window (like firefox or notepad) and focus Scratch Desktop again and you can type again.

Operating System and Browser

Windows 10, Scratch Desktop 3.9.0 (exe)

[apple502j]

Repro: https://scratch.mit.edu/discuss/post/3918729/

Scratch version: 3.9 OS: Windows 10 running in VirtualBox under Ubuntu 20.04
When composing programs the values in tiles will suddenly become uneditable; i.e. when highlighted they're grey instead of blue and you can't change the value. The only remedy seems to be to quit the Scratch application and start it again. I've tried to look for correlates. If this has already occurred with a saved program, then restarting Scratch doesn't help; the tiles are uneditable from the beginning.

[sobreira]

I am facing same issue.
In the original release of Scratch 3.9.0 and also when I try to compile one by myself (changing to the newest Electron version also).
However, I realize that is you switch for any application (Ctrl+tab) and back again, fix the issue.
Another option is to Minimize and Maximize again. (which have same effect as the previous test)

[BryceLTaylor]

Issue scratchfoundation/scratch-gui#5970 has lots of good repro steps.

[spacevoyager78]

Any news on this? It is a really annoying bug.

[spacevoyager78]

Since I teach Scratch to young children, it is frustrating to constantly remind them to click on Windows taskbar and then back to Scratch to regain focus. So, until this is ever fixed, I used AutoHotkey to create a script to detect clicking of buttons in alert or confirm boxes and make Scratch regain focus after 1 second. Ugly, but it works for me, I'll test in a few days with my students.

[spacevoyager78]

Is there any progress fixing this bug?

[rurwin]

This is still happening in Scratch 3.29.1 over four years after this bug was reported and categorized.