Haven't seen that recently, but remember several weeks or months ago some discussion about unattended-upgrades. Had something to do then if apt was configured to install recommends.
# LANG=C aptitude why unattended-upgrades
p plasma-workspace Depends kwin-common (>= 4:5.14)
p kwin-common Recommends plasma-desktop (>= 4:5.14)
p plasma-desktop Recommends plasma-discover (>= 5.14)
p plasma-discover Recommends software-properties-kde
p software-properties-kde Depends python3-software-properties (= 0.96.20.2-2.1)
p python3-software-properties Recommends unattended-upgrades