I had contracts of GE1210115C17 that I went to check on this morning. The option is gone with the following entries in my bank activity log:
02/26/2019 XXXXXXXJJ DISTRIBUTION - Details (Opens Pop-up Layer) (Negative XX.000) $0.0000 $0.00 02/26/2019 GE1210115C17 DISTRIBUTION - Details (Opens Pop-up Layer) XX.000 $0.0000 $0.00
If I click 'details' the only interesting information is that the transaction is "corporate action". All values are set to 0.