Tag check doesn't work if the > of the opening tag is on the next line.

[cardinal-II]

The following code works:
<check if="{{!@user}}">

<check 
  if="{{!@user}}">

But these exampes don't:

<check if="{{!@user}}"
>

<check 
  if="{{!@user}}"
  >

I guess this is because the > of the opening tag is on the next line. That happens if you let your VS code format the code (ctrl + shift + i).

[ikkez]

thanks for reporting.

Fixed in latest commit f3-factory/fatfree-core@d3108e1