Tools Randomly Unselecting for No Apparent Reason

Sometimes when I’m using a drawing tool, it seems like it unselects itself. Like, it’ll still be highlighted like it’s still selected, but none of the settings for that tool like size, pressure, etc. will be there, and it won’t let me use the tool until I select it again. I’m very new to Pencil2D (I’ve only really started using it yesterday) so I don’t know if this is a common problem, and if someone’s already reported this and I just didn’t see it I’m sorry, I just want help with this because it’s super inconvenient. Any solutions would be appreciated! Thanks!