"Your Link destroyed by decay" Activity message

Noticed "Your Link destroyed by decay" activity entries two days ago (on 30.10.2021):
Before that I have seen these messages only once about 8 months ago (on 27.2.2021):
Is this a feature that is working only very rarely?
Or is this a new unpublished feature that is under a very long over 8 months testing?
I can assume these messages can/may cause some high server load.
Samsung S10+ Android 11 2.82.1
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Comments
It happens with portals that I create links or fields recently but it will discharging completely in minutes.