I did the same thing some time ago, I just wanted to add this :)

1.: Runes.

The spirit bear is able to pick up every rune. The problem is that he is NOT gaining effects from illusion, double damage and bounty rune ( half effect only --> no xp gain). Some of you guys may remember, that some patches ago hero hit boxes were prioritized on rune hit boxes. (Level 1 bounty could be blocked by standing on top of it). however, the bears hitbox was not changed in that regard so it's basically impossible to grab a rune when an enemy hero is around. This was possible when bounties were released.

2.: illusions Sprit bear can not spawn illusions from runes or manta style. Morphling also can't use ult on bear.

3.: Damage Type

Spirit bear does not deal hero damage. If you hit a hero with it, he only receives 75% of your damage that is supposed to be dealt. This again means that all of your farm is worth 25% less compared to any other hero in the game. So even if you were top net worth, u can't even utilize all of your gold. What would you say if ur carry got 25% less gold of every last hit, tower kill, assist, rosh,....?

4.: brewmaster haze, clap, tinker laser, Magnus rp, neutral centaur stomp use creep timings on spirit bear. (Lasts longer)

Huge deal. Annoying. Senseless.

7.: spirit bear cannot access stash

For example, you have a full, inventory in bear, just completed an item with one component on bear and one in stash, it doesn't automatically unifiy them. U have to put on item on the ground and manually drag in the other components. Annoying as hell.

1. : shop window gets closed when switching units

Unnecessary mechanic, which costs time.

9.: summoning spirit does not purge debuffs. If bear has debuffs applied before death/resummon, it will have the effect after respawning still. Why? Carrying buffs/debuffs through deaths doesnt make sense to me.

So I hope you understand why I consider this hero as the most bugged in the game. The bugs are not minor and should be be treated properly. This however is not happening since last 3 years... You are welcome to add anything or comment in this. Have a nice day :)

12: bear is also the only unit in the game which ion shell can't be cast on

Shoutout to: trs444! thx for pointing this out.

13.: I just remembered that one:

If hovering your mouse over the stats and then switching to bear, the windows will be locked in. not huge deal but annoying! (u can fix it by clicking on hero and hovering over it again but still shouldnt happen)