I tried to look around the bug report forum for similar bug reports and tried searching but the connection timed out so here goes:
Seraphynx beam stops dealing damage after a few ticks
The enemies start doing the same sound bullets do against mehca knight shields aka. 'blocking sound'. I don't know if this is intentional but I sure hope not because that would mean that the only combat skill of seraphynx would be utterly useless
Seraphynx ultimate lets damage randomly through before expiring
This is self-explanatory. Sometimes the shield holds against floor spikes for example and sometimes it doesn't, even if the effect hasn't timed out or been consumed yet
Violent heart attack deals no damage, only knocks enemies back
Now I don't know if this is intentional or not but if the violent heart attack deals any damage, I haven't noticed it, and if it isn't supposed to deal damage when marked enemies are killed, I'd advise you to change the description and evolution name because "violent heart attack" and "targets destroyed while enchanted create an explosion" strongly imply that damage will be dealt
Maskewraith cloak and dying
If you have maskewraith cloak on and you die your model transforms into dark-transparent version of yourself permanently

Thanks for taking the time to read!