Bug: Buy and Sell Position Lines Do Not Update.

Hi,

Does anyone else have this problem when back-testing v 4.2.17?

As can be seen in the picture below, long and short positions were opened on the first tick,  the short position was then doubled but remains at the same price as when it was opened. 

The same would apply to the long position if its volume was also increased.

This makes back-testing impossible at the mo.