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There seems several bugs of ::usage in mathematica 11.2

First one is that the drop down ::usage always showing the first assigned ::usage

enter image description here

You can see that the ::usage is changed, and ?f is showing the latest usage, but the drop down is still the first assigned usage. What is more, even you restart the kernel, the drop down is still showing the old one! You must close Mathematica completely and restart to get rid of this problem. (this behavior is also reproduced in MMA 11.1 linux version)

Second, I found that if there is Chinese word in the usage, than the drop down will show "$failed at the first line", for example

ClearAll[test]
test::usage = "
  测试";
test[x_, y_] := Module[{}, xy];
?test

will show

enter image description here

matheorem
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