Hello @julie4
Sorry for the delay in respond.
Your case was rare, but luckily, I found the solution.
On this page, I tried to make a chart like yours, which you can check it out via the editor link. The editor also has edit access.
Artisan-plugnplay | Bubble Editor
All I did was set the border width to zero for the bars.
I apologize again for taking so long. If you run into a challenge again or have any questions, I’m always here to help and I promise to respond faster this time. Thank you for your patience.
Best,
Mehrdad