UserForm always visible

I have a UserForm with several buttons in it. I call it with a Code line on opening the relevant sheet.
But then, when I execute a macro by clicking on its button, often the UserForm disappears at the end of the operation.
How can I make it ALWAYS VISIBLE, floating on my screen (I don’t want it to be another tool bar).

Thanks for helping me as efficiently as usual.
ACA

Thanks, Roy. Quick as always.
Well, no; I'm pretty sure the macro does not contain any Hide or Unload instructions.
ACA

Thanks, Roy, for insisting in solving my problem.
As it happens I think I have stumbled upon the solution empirically by trial and error: I notice that my UserForm goes to Hide when the macro executed ends with and END instruction; and it stays visible when the macro is allowed to run up till the closing END SUB.
I don't know if it is an orthodox practice, but it seems to work fine that way.
Thanks for your efforts. I suscribe to all the messages of gratitude in the first thread in this forum. I ow you all more than I can say.
ACA

The form isn't hidden, it completely goes away: End resets everything.

There's usually no reason to use it.