Indents after blank line with tex files

Hi

When I'm editing a tex file with a tabbed/longtable and start a new line
after a blank line, vim indents to the second tabbed paragraph instead
of typing at character 1 where the left hand tab is.

Example to see what I mean:

Title1 & The description text
which may span serveral
lines.\\

Title2 &

At which point I have to backspace or << to the left side of the window.

Is there a way of stopping autoindentation after a blank line?

I've tried playing with (no)smartindent (no)autoindent etc. but cannot
find a way that works properly.

Any help gratefully received.

Thanks

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