Cast bug?

I assume he means the fact that occasionally your character refuses to cast spells until you issue a move order.  Makes everything annoyingly random (I usually remember to just issue a move order first, but that slows me down and sometimes I forget anyway...).

What about when your hero refuses to even melee attack?

This is the lamest part of the game. Even more lame than having to play on Game Ranger. 

Its the same thing, basically the character refuses to do any right click action other than a move order.

Also heart of life gets interrupted when you get in range of an item aura. Atleast i think i saw it 1-2 times.

It also occurs 100% of the time with sedna's heal if you try to heal anyone but yourself. Takes 3 mouse clicks to heal once, really wish it was fixed.

This issue is based on the fact that heal spells at this time only do negativ dmg, eg. if you get healed by 500 it is actually -500 damage. Ever wondered why your demigod spams the "i got hit" sound if you regenerate at a health cristal?  Any damage taken will interrupt things like Heart of Life, so even "friendly" damage like UCBs Ooze ablility. To fix the problem with heal interrupting, the devs can't just take away the interrupt if you take firendly dmg. Or they would give UCB the ability to heal with HoT even with activated Ooze. Because it looks like the devs have to change the whole healing system you should prepare youself for a bit longer waiting time.

I dunno about that, they managed to fix the bulwark of ages bug alright, it used to reduce healing by 25% too. I imagine they would have similar root causes and they managed to differentiate between healing and damage in that case.

Yeah, you are right, i forgot about the bulwark. But I don't know how they fixed that in the game mechanic, maybe fixing damage increase/decrease is way easier than fixing counting at all? (Maybe they only added a hidden "increase dmg by healing spells by 25%" to the bullwark) If not I quite don't get why they didn't fix that HoT issue togehter with the bulwark.

I couldn't see this being a difficult fix.

Something along the lines if damage is greater than 0 then interrupt HoL otherwise do not.  Depending on how the code structure is set up it could be only a few lines.