Dear Maintainer,

Repro by less lb, <End>: it never scrolls anywhere
(and behaves as if it were reading infinite input from a pipe,
 but obviously isn't).
Can be interrupted. Same behaviour with cat lb | less.

By running as less -S lb (or "-S"ing), <End> works again.

echo 99 >> lb  makes <End>ing work as well.

Attaching problematic file.

Best,
наб