The system freezes while selecting the items in Public Shopping List

While selecting the Items in Public Shopping List the screen freezes and goes into error when we try to select 100+ items. This is a very critical scenario for the client.

Redwood - Public Shopping List
(not using Classic)

System Behaviour-

1. The screen freezes while selecting items from the bottom of the Public Shopping List.

2. The screen goes into error trying to select 100+ items.

How can this issue be rectified?