I've marked this as a duplicate of bug #1448145, however your report actually touches on two separate bugs; 1) #1448145 - oxide reports the incorrect surrounding text, telling the keyboard that its still at the start of a sentence when it isn't (which is what makes this sort of issue very prevalent in oxide based apps) and 2) 1442365 - the keyboard very briefly switches back to caps in all apps, meaning that if you type quickly enough a second capital can be entered.
I've marked this as a duplicate of bug #1448145, however your report actually touches on two separate bugs; 1) #1448145 - oxide reports the incorrect surrounding text, telling the keyboard that its still at the start of a sentence when it isn't (which is what makes this sort of issue very prevalent in oxide based apps) and 2) 1442365 - the keyboard very briefly switches back to caps in all apps, meaning that if you type quickly enough a second capital can be entered.