A further issue: I tried the obvious workaround, of setting up relevant Loop Markers on the project, which you can then select on icPro in the bar along the midddle, between the mixer and the project window.
The loop points were all set, on the PC, to the beginning and end of 2 bar sections. However, when you select the loops on icPro, the beginning and end point is 1 click out - so, it shows starting at 18.104.22.168 rather than 22.214.171.124! Working with comp tracks thus becomes even more of a pain, as you have to resize everything, every time.
I have gone back and forth testing this, and can only assume this is a result of the ruler on icPro being time-based, and that the .119 reflects the nearest point to the 1/1000th of a second granularity of the ruler, or something.
Still, this is a pretty fundamental bug - and shocking that it should have gone to market this way.