Does this happen to anyone recently?
By end of December 2018, my point balance was at 406K.
I had hotel stay and credit card usage since then, earning about 4K points. So today my balance is supposed to be 410K.
However, my balance became 400K (it's actually exactly -10K from what it should be). And I checked my activity history -- there is no single activity of -10K in my account history.
Called customer service, got no help.