IB - incorrect average prices

I upgraded to the latest TWS in the hope it would stop "updating" my average price to some random price but it is still going on. While I don't have enough positions in place for me to lose track of prices if I did this would be a HUGE problem.

IB, can you fix this? Note it's never all my positions, often just one or two.

Also, this time it was over the weekend, but often it happens randomly during the trading day.

SSB

 

I've been asking them to fix this for some time now, but still see this problem intermittently.

 

I opened a ticket over the weekend, so far no response.