Character Styles Not Applying & More

I'm having some strange behaviors with Illustrator.

I recently purchased a brand new Macbook Pro, it's been updated to the latest software with the latest CC updates.

I can open a file and begin workflow like normal, but within a few clicks I run into some huge workflow issues:

The first is Illustrator does not apply character styles to an item that is highlighted. I will change the font size, or weight and nothing will happen. I click off and click back on the item, and then try to style it only to see another item changing nearby?

Sometimes the styles will apply, but they will only apply to half the text box, instead of all of it.

While this is happening, my bounding box continuously disappears. I have to use the shortkey to bring it back, and sometimes it won't come back unless I restart Illustrator. There is no way I'm accidentally hitting the shortkey as I'm changing font sizes and colors and possibly scaling the items. No other keys are being pushed when this is happening.

Lastly, sometimes styles I update (font size, color, weight, style) will revert to two or three options prior, after a failed attempt to change the style.

All of these things have been happening for a few days, and making it nearly impossible to use Illustrator.

Does anyone know what would be causing these glitches?

Thanks,