Editing text in `TextBox` in `TableLayoutPanel` causes Bonsai to hang sometimes

[banchan86]

Description

Using a minimal workflow here:

The first string I type in the GUI that pops up when I double click on TableLayoutPanel is ok, but editing the text subsequently can sometimes hang Bonsai.

1. You do not need to save/stop the workflow, it can happen on the first run.
2. It does not always happen, sometimes I can get 1 or 2 edits in before it hangs. It's like a particular action (or character?) misconfigures the stream (not sure if I am using the right words here).

Steps to reproduce

I managed to isolate a reproducible example that worked on two different computers. On Bonsai 2.8.5 it just freezes and becomes unresponsive, on Bonsai 2.9 preview starting the workflow actually throws an unhandled exception that I was able to get a log from. Files attached.

To reproduce in Bonsai 2.8.5:

1. Start the workflow
2. Double click the TableLayoutPanel to bring up the textbox.
3. Select all the text in there
4. Type b and continue typing (should hang)

The attached workflow will crash every time.

Workaround

I have taken to clearing the textbox on every workflow run and making sure I just type the string as it is without messing around with it.

#2059_textbox_tablelayoutpanel_unhandled_exception.zip

[PathogenDavid]

Still need to look at the main issue more but:

Bonsai 2.9 preview starting the workflow actually throws an unhandled exception that I was able to get a log from.

This is maybe related to the generally broken behavior of visualizer mapping in 2.9: bonsai-rx/bonsai#2071

[rachelmcassidy]

I have also encountered this bug with Bonsai 2.8.5. It seems that changing Multiline to False prevents freezing. When Multiline is True, selecting all text and typing causes Bonsai to freeze after the first character, but pressing backspace repeatedly and then typing does not cause freezing for me.