Remove visual select storage after one use?

[JakeQueiser]

I'm not sure if this is a bug, but whenever I perform a visual select and then expand a snippet, I get my visual select right where I want it in my snippet (i.e. which is how it should work), but then if I expand another visual snippet, I get the same piece of text inside this snippet. I don't want this to happen.

Is there a way to make it so that a visual selection is used only once in an expansion, and then not used afterwards? Here are some of the snippets where I see this happen:

global !p
def wraps(char):
	a = vim.current.window.buffer
	b = vim.current.window.cursor[0]
	c = vim.current.window.cursor[1]
	try:
		return a[b-1][c-1] + a[b-1][c] != char 
	except:
		return True 
endglobal

context "wraps('()')"
snippet ( "parenthesis" iA
(${1:${VISUAL}})$0
endsnippet

snippet { "Braces" iA
{
	${1:${VISUAL}}
}
endsnippet

context "wraps('[]')"
snippet [ "Brackets" iA
[${1:${VISUAL}}]$0
endsnippet

Thank you for your help and time.

[chemzqm]

The visual selection should only work once.

[newptcai]

I do have the same problem. If I use visual place holder to put some code in an expanded snippet. Then after that, the visual place holder would be replaced every time when I expand a snippet if I do not select anything when I expand it.

[newptcai]

I finally got it. You have to remove the content of g:coc_selected_text in order to use it for visual content only once.

[newptcai]

I added a key mapping to clean the variable.

" Reset the g:coc_selected_text
nmap <buffer><C-j> :let g:coc_selected_text='' <CR>

Not sure how this can be done automatically.