Bug introduced in 11.1 and fixed in 11.1.1
Whenever the suggestions bar has an item with a pull-down menu of options (that you get by clicking on the down-arrow), picking any of the options results in an error message:
INTERNAL SELF-TEST ERROR: EventTracker|c|521 Click here to find out if this problem is known, and to help improve the Wolfram System by reporting it to Wolfram Research.
If I keep repeating this, the kernel crashes eventually fairly consistently.
This is on Windows 7 64 bit:
"11.1.0 for Microsoft Windows (64-bit) (March 13, 2017)"
Does anyone else have the same issue?