Searching for subtags by description does not produce expected results.

[slavenskoj]

Searching for "Russian" in the subtags description box at https://r12a.github.io/app-subtags/
does not produce a list of all variants that contain the word "Russian" in the subtag comments.

Specifically, this language variant is missing from the results:

%%
Type: variant
Subtag: petr1708
Description: Petrine orthography
Added: 2010-10-10
Prefix: ru
Comments: Russian orthography from the Petrine orthographic reforms of
1708 to the 1917 orthographic reform
%%