sidematter reference notes ignore new lines

Sidematter reference notes ignore new lines. When a new line is created after a sidematter reference note in brackets, the text of the new line is not displayed on a new line. To work around this problem, I insert the HTML code for a space ( ).

TEST
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The following text in the WordPress text (not visual) editor:

line 1: test one [ref]reference for test one[/ref]
line 2: this should be a new line after line 1.

renders as the following

line 1: test one³ line 2: this should be a new line after line 1.

https://www.ads-software.com/plugins/side-matter/