Nutrients Help: Is this Nutr. Lockout?

[achesnpains]

Just changed to a different flowering nute and this happened within one single day. Is it lockout of Mg or Mn? Other? I flushed with H2O and reverted to prior nutes. Hope it is OK but am curious as to the root cause. Here is the picture showing a good LST and the issue at hand.

 

[AutoWonders]

If you have a problem again, you would probably get more help if you post in the "Infirmary" section.

 

[Pro-T]

Looks like light burn, don’t take my word for it though. I’m sure there’s lots of experienced growers that’ll be able to help confirm.