storyboard pro 5.1 zoom in stops working intermittently

i can’t figure out what is going on and can’t find similar posts from a search.

i can zoom out as much as i want but when zooming back in it stops after a few clicks.

sometimes this forces me to reset view just to get back to normal.

this happens whether i use a keyboard shortcut or the zoom button in the sbpro interface.

just started happening today.

i’ve restarted toonboom as well as the computer but same. i opened a different file also same

uninstalled and reinstalled. problem persists.

luckily i found the drop down menu displaying zoom by percentages that goes up to 1000 percent.

this is a workaround but would like to fix the issue so i wouldn’t have to use that option that is less elegant.