Maximum entries in the ARP table?

Hi, I am looking for help because of a problem that happened to me with a SW S6720-32X-LI-32S, I am configuring the SW to redirect the traffic of 3 OLTs to 1 single NAT, in total it has to handle approximately 15 thousand entries in the ARP table divided into 3 vlanif. It had it perfectly configured with 2 OLTs (approximately 7800 entries in the arp table). When i connected the third OLT (approximately 5 thousand IPs-MAC), the arp table only learned until 8192 entries, but the mac address table is correct. Could the mentioned equipment have a limit of 8192 in the arp table? I didn't find anything in the documentation.

I have a S6720-30C-EI-24S as a replacement, but I would like to double check that it is not a configuration issue.

information of the device S6720-32X-LI-32S:

<SW>display version
Huawei Versatile Routing Platform Software
VRP (R) software, Version 5.170 (S6720 V200R011C00SPC200)
Copyright (C) 2000-2017 HUAWEI TECH CO., LTD
HUAWEI S6720-32X-LI-32S-AC Routing Switch uptime is 7 weeks, 4 days, 8 hours, 6 minutes

ES5D2S32S005 0(Master)  : uptime is 7 weeks, 4 days, 8 hours, 5 minutes
DDR             Memory Size : 1024  M bytes
FLASH Total     Memory Size : 512   M bytes
FLASH Available Memory Size : 360   M bytes
Pcb           Version   : VER.A
BootROM       Version   : 020b.0001
BootLoad      Version   : 020b.0001
CPLD          Version   : 0106
Software      Version   : VRP (R) Software, Version 5.170 (V200R011C00SPC200)

I`d appreciate any help you can give me.

Thanks greetings,