As we all know every battle you join creates a memory footprint. This appears from my tests never to be removed. So the bigger the map the more memory is consumed. That is not removed.
recent memory tests gave 20 mby for a salv, 130 for a dub, 280 for a scourge 103, etc etc
this was still there after battle had finished.
Fix this and your customer base will be much happier.