Which species, where on the plant, how fast is it happening, etc. The more we know......
I assume this is the same tank you have been posting about, the 175 with all the new planting?
Remember that plants need adaption time even to BETTER conditions, so some is to be expected.
Depends on how much and if it continues, etc.
Plus, you are still figuring out c02 and dosing, so not like your tank is 'established'.