In Safari 11.1 (11605.1.33.1.3) latest version, on MacbookPro, math in an inline-styled p causes a line break

This is a heading

Inline paragraph. Suppose \(x\) is a number.

This is another heading

Block paragraph. Suppose \(y\) is a number.

This is a sentence.

Inline paragraph. Suppose \(x\) is a number.

This is a paragraph \(a^3\) styled inline.

This is another sentence.

Block paragraph. Suppose \(y\) is a number.