When I launch wolframscript form shell, it always prints "Updating from Wolfram Research server ..." after In

Like this:

$ wolframscript
Wolfram Language 11.2.0 Engine for Mac OS X x86 (64-bit)
Copyright 1988-2017 Wolfram Research, Inc.

In[1]:= Updating from Wolfram Research server ...

If I type wolframscript -code 1+1 > foo.txt, everything is OK.

cat foo.txt will return:

2

But if I type wolframscript -code 9^9^9 > bar.txt, "Updating from Wolfram Research server ..." will be added at the beginning of bar.txt.

head -c 100 bar.txt will return:

Updating from Wolfram Research server ...
4281247731757470480369871159305635213390554822414435141747

Waiting or disconnecting the network can't solve this problem.