Leader lines from REF to footprint, suddenly missing (V7 / Linux Mint 21.3)

Platform Linux Mint 21.3 (latest update, upgraded yesterday).

I did not notice this behaviour immediately after upgrading to Mint 21.3, so perhaps it has nothing to do with that change. But today, when I move a REF or other text associated with a footprint on the PCB, there is no leader-line connecting the text to the anchor point. Did I inadvertently turn this behaviour off?