The problem is with the Adblock Plus - free ad blocker - 3.8.4 - April 8, 2020.
Try the example below.
__________________________________________________________________________________________________________________________
BROWSER
- Firefox NIGHTLY - 78.0a1 (2020-05-17) (64-bit
- TESTE PAGE - 
https://www.softexia.com/
ADDONS
 - NoScript - 11.0.26rc2 - May 17, 2020
 - Adblock Plus - free ad blocker - 3.8.4 - April 8, 2020
   
https://adblockplus.org/
__________________________________________________________________________________________________________________________
1 - Open - NIGHTLY
2 - Open - PAGE - 
https://www.softexia.com/
3 - Enable - ONLY - NoScript 
4 - Reload - PAGE
                  RESULT - NoScript - 2 Blocks + PAGE
5 - Enable - Adblock Plus
6 - Close - NIGHTLY
7 - Open Again - NIGHTLY
8 - Open - PAGE - 
https://www.softexia.com/
                   RESULT - NoScript - ONLY PAGE (BUG)