Hmmmm I just bought vouchers too and that is listed on them. Hopefully it is staying the same so we can use them since we just got them. I emailed Disney about it when they did the changeover and there was confusion on if it was premium or regular (it was listed differently in different places and no announcement of change) and thankfully
Disneyland Daily (Casey) was able to speak to Disney and get a straight answer- my emails were met with a you can use vouchers and if the cost is more pay the extra and we can change our minds at any time with no announcement and gave me no answer on which it was.... anyway- I’m July in was still regular and I bought my vouchers last week so here’s to hoping lol anything to raise prices I guess. I’ll see if I can find out more info and will post if I do!