Sinclair stops dealing damage with combo if target starts hexed, and becomes unhexed

[Gilational]

Issue found while testing for https://forums.playdeadlock.com/thr...mbo-against-rabbits-crashes-the-server.54129/
Did not attempt to replicate in match

Reproduction steps:
1) Sinclair copies Mo's Combo ability
2) Sinclair uses Combo against a rabbit (hexed) target
3) Target's hex duration ends
4) Sinclair's Combo stops dealing damage