First 1/32nd of tips burnt

My plants are due for a feeding tonight. As of now the first 1/32nd, the very tips, are burnt. I've heard that no big deal but I want second opinions.

Should I feed as scheduled tonight?

I don't have a camera. Since it's only 2 out of plants showing this and the conditions have been ideal (75 degrees and 45% rh) I feel it's mild nute burn. I haven't been feeding too heavy, I just didn't give these two plants a break when they needed it because I wanted them fed as they went into flower.

I forgot to mention they're about 4 weeks from the 12-12 flip. How much worse would it progress if I gave them their regular feeding tonight? I'd hate to not give them enough food during flowering. It takes my a week for the pots to dry out so I won't be irrigating for a week after tonight.

In flower is it better for them to have not enough food than over feeding?