Hey all!
This is a super sh*tty issue, sorry.
I recently posted some context on Twitter around this issue if you want to know more: https://twitter.com/RiotHjarta/status/1273688612807176192 but the TL;DR is that we have code that makes sure that all the damage you were supposed to get, gets applied in the end in case something went wrong. You're not receiving extra damage, but you're receiving it late.
If you have any idea how to get this to happen, please let me know.
Additional videos help as well!