Chrome Version: 71.0.3569.0 (Official Build) dev (64-bit)
OS: Linux

What steps will reproduce the problem?
(1)load the attached testcase
(2)
(3)

What is the expected result?
The buttons on the same line should render the same.
They should all display their text like so:
a
b
c

What happens instead?
The first button on each line reads "abc" (horizontally).

Additionally, Chrome v71 on OSX renders the text in the last button
on the first row horizontally too (BUG).  This bug doesn't occur
on Linux though.

(see Firefox for correct results)
 

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