Execution rare enemy modifier not allowing healing

Clip:
https://www.youtube.com/watch?v=cwiALwxZTPo

This could be tricky to parse
Fighting an enemy with "prevents recovery above 50%"
I hav an instant life flask
I get damaged below 50%
I use the flask (you can see the flask charges decrease)
I do not heal up to 50%.

Have you accidently coded this as "cannot heal above low life" which of course you recently changed to 35%?