Rich text control does not allow to type in space character

Category

[ ] Enhancement

[x] Bug

[ ] Question

Version

Please specify what version of the library you are using: [ 3.15.0 ]

Expected / Desired Behavior / Question

I can type in space into RichText control.

Observed Behavior

onChange callback does not fire when space key is pressed. Also pasting (CTRL+V) space character does nothing. Only way to add space is pasting text that has some text surrounding spaces.

Steps to Reproduce

SPFx version: 1.17.3
Simple SPFx Webpart. I have a button on property pane, that makes a Fluent UI Panel open. On this panel I have a RichText control. It is controlled with reducer-based state.

<Stack styles={{ root: { paddingTop: 32 } }}>
  <RichText value={item.value}
    className={"ql-active"}
    isEditMode={item.type === ECustomPropertyType.Static}
    onChange={(v) => {
        console.log("CHANGE", v); // shows that no event is fired for space
        actions.changeValue({ id: item.id, value: v }); // action that changes state through reducer
        return v;
    }} />
</Stack>

Start by reproducing the controlled RichText example in an SPFx 1.17.3 web part, checking both typing and pasting a space. Trace the RichText onChange path and state updates; the issue is done when standalone spaces trigger onChange and appear correctly in the control.