Keyboard skips forward and get a weird text box with symbols popping up
When I type anything. Texting or emailing on my Mac the curser will intermittently skip forward sometimes 4 to 5 spaces. Also a little text box with weird symbols pops up for a few seconds then goes away. I turned off by bluetooth to the keyboard then turned it back on. What causes this(just got the weird text box again after typing the word causes).
iMac, 10.13