Same issue. Wildly inefficient.

Pressing the hotkeys or going to view *does not* fix this issue.

Shift+CMD+B
or you can select from view menu

Bounding Box appears to disappear and reappear at random times. Yes, I'm aware of Shift+Command+B, still doesn't appear to fix issue. In conjunction with this same issue, elements/shapes appear to get "stuck" in certain positions – not allowing them to be edited. Also in conjunction, elements/shapes revert back to earlier state while trying to move, transform, or edit them.

You can click Cmd/Ctrl+Shift+B or Go up to View and click Show Bounding Box to bring that feature back

Do a marquee select around what you want to scale, hold down the Command key (and Shift key if you want to scale proportionately), you'll see the handles, drag a corner to scale.

The bounding box keeps turning “off” or disappearing altogether. Temporarily reappears when switching layer visibility or CPU/GPU view. Sometimes appears on objects that are no longer selected. Even the layers panel sometimes incorrectly shows which objects are selected. The work area sometimes does not show items that are moved or resized. It’s like there is some kind of lag between the actual state of the document and the visible state.

Reverted to old version I don't have the time to solve this now.

Tried all suggestions below still gone and now the phone is ringing with the client wondering where his change is because he wants to leave for the holiday. Perfect all.

Tried the bounding box still gone

Yep. Super bad I'm on a dead line too when it started this new freak out. I restarted and then Illustrator didn't want to open.

I had the same issue but uninstalled then reinstalled Illustrator and that seemed to fix it.. for now.

Based on the image you posted, it looks like you have the Direct Tool selected (renders anchor points when you do this). The bounding box only appears when using the regular Selection Tool (black arrow).

I'm having the same issue. Illustrator works fine for a couple of hours and then the bounding boxes start disappearing, or odder yet, I select one object and it has no bounding box while another element gets selected on its own with it's own bounding box. In other words, 2 objects are selected at the same time by just clicking on one. ???

And sorry I keep coming up Anonymous. I've logged in but it's not recognizing my username for some reason.

Same issues since updating. Renders program next to useless. Been using since 1992 and worse release yet.

I am having the same issue. I can't resize or rotate anything if I am using 2019.

I'm having the same issue. Primary when working with point-type text and try to scale it using the bounding box. Only, my bounding boxes will disappear from said text and be applied to some other random element (even on another artboard). So when I go to scale the text some other element on some other artboard is what gets scaled. NOT the original text. Super annoying and the only temp fix is the hide the bounding box and then showing it again. Other fix is to quit and restart Illustrator

It took me a while to find that Direct Selection Tool is hidden with Magic Want Toll.

I was having this problem also today. I think they just changed the tool and how it works. I was able to add an anchor point by selecting my item, clicking on the 'Pen Tool' and then using that tool to add the anchor point.
Worked for me :)
Just don't use the Anchor Point Tool :/

I'm having a similar problem on my mac - I click on the anchor point but it doesn't select it and give me handles. It works on the pc but not on the mac. I've restarted, have show bounding box on, show edges on, it's a bug! WHAT IS THE FIX????

The fix for this seems to be: Under VIEW, turn on BOUNDING BOXES. Worked for me at least. They disappeared all of a sudden when I last restarted. Working on Mac.