Sometimes when I send a pirate to target another sub the trajectory isn't a straight line but is curved and it causes the pirate to not be able to reach its target in time. Despite this, the pirate can still be launched and then simply turns around without ever reaching its target.

Maybe it is jut when targeting subs with generals or specialists.

I have also had this problem but it only occurs when the pirate is targeting a smuggler. A straight line is draw to where they *should* intercept but the pirate doesn't follow that path instead launches directly to the smuggler and will start to arc or curve once the smuggler starts to get beyond the pirate. I have only encountered this once as I generally cannot target smugglers with my pirates because they are too fast but my opponent had sent his smuggler on a long range mission but I was unable to take it out due to this bug... Wish I had launched the sub for photo proof :/ I canceled when I saw it in the time machine

I've seen this as well.

I appears that it doesn't reach it's target because there is a 10 minute "turning" delay as it changes it's direction each tick.

Normally the Pirate tries to take the most efficient, straight line, intercept course to a target. If for some reason it figures out that it's not possible, then it does its best by simply heading towards the target itself.

This can definitely happen when the Pirate is already headed towards a target and the opponent hires a Navigator, increasing the speed of the target.

Unfortunately I have also seen it happen in other cases (like this one probably). It looks like there's a mismatch between the speed calculations when launching the Pirate and when actually executing it. I'll be taking a look at this over the next few days and release a fix in an upcoming update.