Drying new stems on NoID plants

[Eirael]

Hello everyone!
First of all, thanks to everyone who contributes to this amazing forum. Im a newcomer both here and to orchids, so please excuse my mistakes! 🙂

I have a bunch of NoID plants - from home stores, flower shops, some I got as a gift... All of them looked like healthy plants when I got them (they were in full, nice bloom). They still look quite OK to me - they have big, green leaves (and constantly create new ones) and strong green roots.

I cut the old dried flower stems and waited for the new blooming season. So I got very excited when the plants grew nice, strong flower stems - but all of them started weirdly drying and not creating blooms (I've attached photos) - except for one, which however branches into many smaller stems (which is probably also not okay).

Do you guys have any tips what am I doing wrong or whats happening to the plants?

The "setup" : they all sit on a windowsill oriented to East, I lightly spray the leaves with water every two days. Every two weeks, I shower them in a bath and let them sit in the water for 15 minutes, then I let them dry and place them back on the windowsill. Every week I also apply orchid fertilizer (using instructions on the bottle).

Many thanks for you time