Pppoe server internal pool ip addigning issue

Bugs
1

I am facing massive user disconnect issue. I checked with radius team. They told its pool issue users are not getting ip addresses. And also I noticed that internal pool ip addresses are not assigned in order. Some ip adresses are skipped between one user to next user. Like user 1 got ip address of .1 and next got .7. why gap

2

as u can see I have shared screenshot

17166242167358513024921085751135
171662421673585130249210857511351920×1440 309 KB

4,6,18,23 these are missing in this screenshot only

3

“reset pppoe-server interface all”
command does nothing. Once router is rebooted issue is resolved. I this ip addresses are not freed and reused once user is disconnected.