[Zamaroht]

Remember that every time you create a Text: tagged variable, you should make its default value Text:INVALID_TEXT_DRAW, otherwise the default value will be 0. That means, that if you use TextDrawHideForPlayer/All, or TextDrawDestroy functions in any of these variables before assigning them a textdraw, the action will be applied to the textdraw with id 0, which is the first created textdraw.

This problem is very common, are you sure this isn't your case?