List folder continue API or SDK method return different result record count for each cursor

First we are calling list folder with limit as 200

 

limit UInt32(min=1, max=2000)?The maximum number of results to return per request. Note: This is an approximate number and there can be slightly more entries returned in some cases. This field is optional.

 

Then after getting first 200 records , we are calling list folder continue using following,

https://www.dropbox.com/developers/documentation/http/documentation#files-list_folder-continue

Here are getting result but each time total number of entries vary as follows,

 

200 (list folder , result entries count)

Below are list folder continue result entries count
130
86
5
14
206
4
27
30
149
3
31
1
3
22
210
203