Table not expanded as I expect upon <TAB>

[Alain.Cochard@unistra.fr]

Maybe it is normal, but if I put the cursor anywhere in the 1st line
(say) of this table

||---+---|
|| x | x |

and press <TAB>, it becomes

|   | ---+--- |   |
|   | x       | x |

which is not what I would expect.


By contrast, if <TAB> on this one

|---|+---|
| x || x |

it becomes 

|---+---+---|
| x |   | x |

Further, by doing M-<LEFT> on the 2nd column, it becomes

|---+---+---|
|   | x | x |

and using <TAB> then does not change the table, which is the result I
would have expected to start with.


Org mode version 9.7-pre release_9.6.1-321-g44e1cb

GNU Emacs 27.2 (build 1, x86_64-redhat-linux-gnu, GTK+ Version
3.24.30, cairo version 1.17.4) of 2021-08-07

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