Peace runic word problem

Hello, the runic word peace provides a 2% chance to summon the valkyrie on hit. The problem is that it disappears by itself after a few seconds. A few months ago, I had the valkyrie at level 10 and I realized that this word existed runica and I stopped summoning her manually to summon her from that 2% of summoning when attacking. Could that have something to do with that? I mean, now I have another Amazon and I haven’t given any points to Valkyrie. There could be conflict there? It’s very frustrating. I can provide video if necessary. I play on BNET

It’s because you don’t have at least 1 point in Valk. Add a point and she will stay.

It is the same for other summons, that get desummoned if you unequip or switch the weapon that gave you the skill points to summon them.