Pagination not working in one of our reports

Hello,

for some reason pagination stopped working in
'custom.m4change.reports.mcct_project_review.McctProjectReview' and I'm not
quite sure as to what might be the cause. We haven't modified the code in
over two weeks and whenever I try to change the report's page, nothing
happens, and it used to work without a problem. There are no errors, and no
debug info in the console. This happens both locally and on production.
Does anyone have an idea what might be broken here?

Regards
Lech