It sounds like your gcode file might be using absolute E-values. That means that if you do a lot of jogging in the middle of the print, it will try to go back to the same absolute position when it starts printing again. Can you try going to the G-Code tab of your process settings and enabling the &q...
I slice parts taller than that all the time. Are you sure you don't have the "stop printing at height" option enabled on the Advanced tab? Is your build volume in S3D taller than 300mm?
Go to the Advanced tab and disable the "only retract when crossing open spaces" option. That will help make sure it retracts and lift for internal moves as well.
Well there's an easy way to get to the bottom of it - why don't you post your profile here? That should make it pretty easy to see what you have changed that is causing the issue.
There are a lot of things you could change with the profile that would cause it to send the wrong command, so I doubt it's related to the software version. It's more likely due to a change you made with the profile. So that's why I recommended trying the stock profile to see if that works. You can s...
Well you might want to actually look through the gcode for the first hundred lines of your print to see if you see any big "G1 E-XXX" commands that would be causing a big retraction. I know I have used firmwares in the past that did big retractions automatically when starting a print, usua...