Most lost business in a small company is not lost in an argument about price. It is lost quietly. An enquiry arrives on Saturday and is seen on Tuesday. A quotation goes out and nobody asks about it again. A customer says call me after the festival season, and nobody does. Your people are not careless. They are carrying twenty conversations in their head while travelling, quoting and chasing payments. Follow-up is the first thing to slip, because it is the only task with nobody standing at the door waiting for it.
Why it persists. It persists because follow-up is nobody's job in particular. It sits between marketing, which counts leads, and sales, which counts orders, so the gap in the middle belongs to whoever remembers. Adding a rule does not fix it either: a reminder nobody has time to act on becomes another notification to dismiss. The real blocker is that writing a specific, useful, non-annoying message takes several minutes each time, and multiplied across a week it is more time than your team actually has.
If it stays unresolved. Left alone, the habit hardens. Your team learns to work only the enquiries that chase them, because those are the ones that feel real. Everything else is filed under later. You then buy more leads to make up for the ones already sitting untouched, so your cost per order rises while everybody insists, honestly, that they are busier than ever.