I can confirm on my end. Placing 8 empty actors with verse tags increased my memory thermometer from 39k to 94k. After deleting them my memory reverted back to 39k. I suspect that this bug has existed for ages as my map always felt heavier than it should have.
In my use case I used them to easily get the vector on my map. Using an array for the same actors don’t seem to affect the memory in the same way.
Do you happen to have an island code that shows this problem that you could share the link code to? That would be very helpful in understanding what exactly is happening.