"NaN minutes"

i’m using vivaldi

when i try to select an amount of time to leave a block for (defaults to 1 min), it jumps to this. i’m unable to move it to any number no matter how much i drag left or right

if i click “leave this block”, the block ends indefinitely

(if i click it while it’s still on the default value of 1m, it ends for 1m as expected)