Running sample code but quality of call is not upto the mark

// Detailed description of issue.
—While using the sample code and trying to make group video call, there is audio/video loss sometimes, flickering of the other person’s video is another issue plus screen goes black some times. These issues won’t allow us to maintain our calls using sendBird. Any suggestions on improvements can help!
// If problem, please fill out the below. If question, please delete.
[SDK Version]
// What version of the SDK are you using?1.10.13

[Reproduction Steps]
// Please provide reproduction steps and, if possible, code snippets. Sample code downloaded from GitHub

// How frequently is this issue occurring? every call

[Current impact]
// How is this currently impacting your implementation? not able to proceed smoothly