Folks, this has been happening for YEARS. The earliest report of this bug that I can find is from 2017, and Adobe has yet to fix it.

I have a file with multiple artboards (155 to be exact).
Noticed that Illustrator is not numbering them correctly around the number 80, repeating some numbers. It's also not exporting all of them. In 155 files, 3 were not exported!

The numbering of the artboards show "16" instead of "15".

MacOS 14.4.1 / Illustrator 28.4.1
When I duplicate the artboard by command + drag, I found that the artboard number got wrong. It appeared two "38" and two "40". Although it can be fixed by restarting, but I expect a bug should not occur in such simple action. Thanks!

Just had the bug happen to me again on Windows. I've provided a memory dump as requested by Egor.

The number of the drawing board is repeated

I created 15 distinct artboards...but it created artboard 14 twice...so when I exported all the artboards it skipped the one that should have been artboard 13

Non esiste la tavola da disegno n°4

Non esiste la tavola da disegno n°4

Still present on the latest update in mid November 2023.

Two artboards are numbered as artboard 12. This is not the artboard name- those can be changed and different - but the number that refers to the order. I can delete the second artboard 12, but then, what was 13 is another artboard 12. This is very inconvenient for saving and printing as it won't save or print both artboard 12s, just one of them.

Artboard number duplication bug

When creating artboards, after reaching artboard num. 49 the next artboard and the one after that will both be number 51, skipping 50. When exporting all artboards as images, only one of the arboards labelled '51' will get exported.

This happens on both the latest Windows and MacOS versions of Illustrator.

When I created a new artboard (either by clicking the button or duplicating) after Artboard #39, #40 is always skipped.

The artboard numbering is broken. Screenshot shows how artboard numbers go 5, 6, 8, 8, 10, 10, 11, 12, 14, 14, 15 etc.

アートボードの6枚目を作成すると、「6」ではなく「7」が作成されてしまいます。（添付した画像を参照）
自分で修正することは可能ですか？

When creating new artboards in a new file it is skipping Artboard # 69, and instead creating two Artboard #70's instead. This is on Windows 10 Enterprise (22H2) with version 27.6.1 (64bit)

When I was duplicating a new artboard, the sequence number became 8 when the number of artboards reached 7. However, the sequence number remained 8 for the eighth artboard, and when I attempted to create a new document, it remained abnormal. The issue was resolved when I launched the official version of Illustrator. When exporting, there were missing artboards due to duplicate sequence numbers. After ten minutes, when I restarted Illustrator Beta, it displayed normally. The version of Illustrator I am using is 27.7 39 (64-bit).

Since Illustrator's last update (I'm using Illustrator 27.5), when I create more than 8 artboards, it skips artboard 8 and goes straight to artboard 9. So when I export all artboards as PNG, it skips artboard 8 because there are two artboards 9 and Illustrator only recognizes one of them.

(I'm using a Macbook with OS 11.7)

I have Illustrator v 27.5 on an iMac with macOS 13.3.1 (a)

I have a file here with 67 artboards in it. I am able to rename the artboards just fine as expected, but there appears to be an issue with the actual number illustrator has assigned to artboard 57.

There is no Artboard 57, and instead the number 58 appears twice.

Please see the attached screenshot - specifically in the pink circle.