Yes low WBC is quite common with Folfox/chemo.
I had low WBC after the very first treatment neutrophils were at 1050 AKA 1.05 - depending on your chart reading.
They still gave me chemo, and then I got 2 granix shots the next week. But still at treatment 3 I was delayed 2 days because my neutrophils had dropped to 420.
Treatment 4 I received 2 more shots and my neutrophils boosted to 5500. Shots were spaced out more and given little before the day prior to treatment.
Treatment 5 they reduced me to one zarzio shot 2 days before infusion. My neutrophils were down to 770, but they wanted me to do chemo anyways. So with a little reluctance I gave in.
Next week I have to look forward to 3 zarzio shots on my good week... BLAH! They cause at the least, some bone and muscle lethargy, and at the most excruciating bone wrenching pain.
You made it to round 8 before having low WBC, you did quite well in my book.
My last nurse told me about 80% experience low WBC at the center I attend.
After 8 rounds if you have done Olaxi the entire time at max dose, you might also consider lowering the dose significantly or even dropping it if you're experiencing other neuropathy effects that are severe.
If you have low neutrophils you'll want to minimize any and all risk of infection.
I found this document very helpful
https://patienteducation.osumc.edu/documents/low_wbc_precautions.pdf