"Preference issue" refers to a situation where there are different choices available and people have different opinions or desires about which option is the best or most appealing. It means that there is no objectively right or wrong answer, but rather a matter of personal preference.
Full definition
Some cats like a quiet and hidden place for their box and if the owner has moved it, there might be
a preference issue.
The liquid or chewable tablet form is
a preference issue for your pet to decide.