I've encountered an issue with text highlighting in my asp.net web application when using the latest versions of FireFox and Google Chrome. Strangely, pressing CTRL+A also does not work for all input fields. I haven't had the opportunity to test it on older browser versions yet, but everything seems to be working fine in Edge.
Upon further investigation, I noticed that double-clicking on text or trying to highlight by dragging the cursor doesn't work properly. However, copying and pasting the text does seem to select it, even though it's not visually highlighted.
I meticulously examined my CSS for any instances of 'disable-select' but couldn't find anything relevant. Are there any other potential causes that could be behind this issue?