I experienced it last time, and I experience it now:
While I receive all "Your Clash is On" mails, there are quite a few "Your Clash is Over" mails missing.
In total, the count is 24 / 9, 62% of the "Over" messages missing.
For the current event, it's 5 / 1 for the finished clashes, 80% missing.
Last time I only received messages of clashes we won, the only message now is from a clash that we lost, but not with zero points. 2 wins, 2 "zero" losses missing.
I've checked the spam bins to no avail.
Asking myself, how did they screw it up this time?