Web Screens user locking issue during multiple posting

Dear Team,

i have an issue where by while users are using web screens to post an entry like AP invoice entry there is an error of user lock.

Where by the posting assumes the entry has been done or modified by another user which is not the case, i suspect they entries are locking while assigning posting sequence numbers.

the issue is random and am suspecting internet bandwidth at workstation environment.

What is the appropriate bandwidth upload and download is the best appropriate to work with web screens?

Many thanks,

Peter