+Add for flowlines isn't working

I’ve already created two flowlines and am currently making a third, but i’m not getting the +add option to put in the time for the flowlines. everything else went smooth.

i’m not sure if its something wrong on my end or a bug. using 2.4.0

Edit: i’ve seem to have found a fix. I need to close the program and reopen it.

It’s because the second time you create a flowline the gpml:times are already added for you (they’re the same gpml:times as the first flowline(s) to make adding them quicker).

You can either remove the gpml:times (with Remove button) to get the +Add button back, or edit them (with the Edit button).