Your system information

• Steam client version (build number or date): built May 30 2023 20:40:12
• Distribution (e.g. Ubuntu): Endeavor OS (Arch based distro)
• Opted into Steam client beta?: No
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

When calling:

SteamHTMLSurface()->KeyDown(browserHandle, 8, ISteamHTMLSurface::k_eHTMLKeyModifier_None);

or

SteamHTMLSurface()->KeyChar(browserHandle, 8, ISteamHTMLSurface::k_eHTMLKeyModifier_None);

... on a focused HTML input text element I'd expect that the entered text has the last character removed - just like when doing normal BACKSPACE keyboard input in any HTML input element in any browser. As an example this puts an a in my focused HTML input element:
SteamHTMLSurface()->KeyChar(browserHandle, 97, ISteamHTMLSurface::k_eHTMLKeyModifier_None);

Steam built-in CEF/HTML backend seem to ignore when sending backspace character codes via KeyChar/KeyDown (the docs are not clear on when to use which - but no combination of order and calls seem to make a difference).

It's worth noting that I can't get arrow keys to work either (I-beam) cursor doesn't move when sending codes 37, 38, 39, 40

Steps for reproducing this issue:

1. Setup the HHTMLBrowser + Input handling via C++ and SDL2 - things render fine and normal ASCII alphabet + space + numbers 0-9 characters and works in HTML text input elements via KeyChar/KeyDown

2. Send nNativeKeyCode = 8 as input to either of KeyChar/KeyDown

3. No characters are deleted from the HTML text input element

Any help will be greatly appreciated