ⓘ Values with a # were written unquoted, so on the next read the module took the # as the start of a comment and lost the rest of the line.
For example, a redirect saved as return 301 https://example.com/docs#install; then showed as no redirect on the page, and re-saving it added a duplicate rewrite_log directive that Nginx rejected.
So, before the fix, saving a redirect to https://example.com/docs#install wrote:
return 301 https://example.com/docs#install;
rewrite_log off;
On the next read the module dropped everything after the #, so it saw one merged line:
return 301 https://example.com/docs rewrite_log off;
The redirect disappeared from the page, and saving again appended a second rewrite_log off;, which Nginx rejects as a duplicate.
After the fix the same save writes:
return 301 "https://example.com/docs#install";
rewrite_log off;
Nginx treats the quoted and unquoted forms identically, and the module reads it back correctly.
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