hikconnect app always slow and "network unstable message"

hello! i have about 7 dvrs and hikconnect is always so slow. ill always get the netowrk is unstable message whether i am on 5g wifi or lte. the dvr's are connected to 1gb down and 125 mpbs upload internet so i feel that is for sure fast enoug. our internet connection is fast enough like i dont think its hogged or anything. i am running ds7604 and ds7616. i feel like the ds7616 have less of a problem on hikconnect while the ds7604 are worse.
i have tried port forwarding and it didnt seem to...

hikconnect app always slow and "network unstable message"