On Wed, Aug 19, 2020 at 09:52 AM, J_Catlady wrote:
there should be a different alternative
It sounds like what you want is another option - Never Lock Topic - on the More menu. Maybe use the lock-open icon to differentiate from the Unlock Topic option that uses the unlock icon.
I believe the current operation is correct, not a bug, in that it operates exactly like it's supposed to - lock anything older than xx days.