A notorious bug which plagued a number of TWS versions in 2007 may be back! Prices may temporarily freeze and not be updated without warning in TWS 893.5. It happened to mine five times within one hour. Thankfully, my second computer doesn't run TWS 893 and I spotted the problem. P.S. I'm not an IB employee, just another long-suffering TWS user (and reluctant, unpaid TWS beta tester).