It seems that Numbers give a suggestion based on what is already in the sheet. Like in the image.
How to disable this?
MacOS – Disable suggestions as you type on Numbers
macosnumbers
Related Solutions
In your question, you mention:
double tap
So is it safe to say you are referring to Numbers on iOS? If so, to lock a table or element do the following:
- Tap the Format icon (Paint brush)
- Tap the Arrange tab.
- There you will see a Lock. This will lock the element from moving and prevent editing.
To edit again or move, unlock in the same manner.
Hope this helps!
I'm not sure why it's included in the export, but this is one of the default "Image Fills": 
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Best Answer
Go to Preferences in Numbers,
and disable the
.
it is enabled by default.