Language lists beyond record 40 cannot be reached

In Administration > Lists > Language, only records 1 to 40 are listed, of 185. If I specify other records to display, such as 41 to 60, and select “Show records”, then I get 3 blank results and the selected list has reset to the first in the drop-down list.

There are other lists with > 40 items for which this process works fine.

This is in OpenEMR 5.0.2.1 on Debian.

I see nothing in /var/log/apache2/error.log or Administration > Other > Logs

Thanks

Another day and this feature is now working as expected.