I haven't had any of those bugs in play testing. All current testing has been done with no unit packs (except BrewLAN, on occasion), and using the AI included in AI Wave Survival. The last FAF patch broke multiple AI's and BlackOps Unleashed.
What mods are you currently using? BlackOps Unleashed will cause an infinite loop (frozen gameplay but functional UI) because of bugs caused by the latest update. And what size waves are you using? I've tested with up to 200 units per wave, with waves every 2 minutes without issues.
The pathfinding bug seems very strange. Is it map specific? Only time I encountered that was on a map with an actual invisible wall (map terrain marked as lava, making it impassable). And Retributer had an issue with Dooms spawning incorrectly, but I was never able to recreate the bug.
My best guess is it is a mod conflict, introducing errors that are breaking scripts. But I would have to know what mods you are currently using. And checking your game Log for errors and posting here would be a big help.