@Torthak thats intended. You keep some stuff after Ascending so you start with a few bonuses already and can get back to your old progress point faster - normal for this genre of games. Achievements, quests, titles mainly - the game also tells you that somewhere.
Some ideas/improvement suggestions:
Show us the price of the item currently sold. Its kinda hard to see at max production rate of 10 items per second.
'Ingot Efficieny' may needs a slight buff. You keep running out of Bars in late stages of the game even with close to 100% crit rate.
As other people already wrote:
Give us an option to overwrite potions/cancel the current active one.
Any chance we could eventually reroll titles for a few SP? Probably hard to find a decent balanced value for it but you could increase the cost per reroll or sth.
Ascension seems to become worthless kinda fast. I did it 2 times so far with ~8m and ~8b. Sitting at 136b if I would Ascend again however everything except 'Rich Starter' is already maxed out.
(stupid 1000 character limitation per post..)
Any chance we could get an info window for stats? Would love to see my total work power bonus, crit chance/multiplier etc for each worker. It can sometimes be difficult to judge whats the best e.g. title to pick is since bonuses are coming from like 4 or 5 different sources (upgrades, achievement, potions, titles, SP).
 "Idle Blacksmith 2")