Does Amazon have a slow season? Kitchen products.

launched a new product back in January and quickly sold out 300 units by mid February, received my new shipment late in April due to supplier issues. So we pretty much had to do a re launch.. kinda Got back on track last month with sales and sold nearly 100 units within 30 days. We were on a upward trend but now it’s like we have been suppressed. we are lucky to sell 4 units in a day. Are we in a slow period? If so what are normally the slow periods for fba selling? Like I said I’m fairly new to this, just started early January and this is pretty confusing to be in an upward trend and just come crashing down like this. Literally have dropped from 32-35000 bsr ranking to the 140s within a week. This is wild.