FPS drop and inability to move or use spells in map

I'm playing maps with lots of Harbingers and Obelisks, also I'm usually using some form of ward loop build.

Occasionally, my fps suddenly drop to around 2 while clearing a map and never recover. The only solution is to restart the client. I assume this may have something to do with hit calculations and something never getting cleared up, continuously doing these calculations and never stopping.

Here are two bug report IDs where this happened in a map:
Bug Report ID: #2197339549
Bug Report ID: #1310696840

Will keep adding these as I encounter this bug while playing:
Bug Report ID: #2196382233