This is also affecting me with collections on PS4 Pro and Samsung Tizen. Works as expected through Chrome.
Behaviour is same - when I open any collection and scroll down one line all poster tiles disappear and I’m left with a blank screen. When I scroll down poster tiles then appear. First row is always inaccessible, unless you scroll all the way to the bottom and back up, otherwise you always get a blank page attempting to access first row.
PS4 Pro - 5.10.0 / Platform Version v2.6.2-0-gceebfa36
Samsung - Client Version 5.10.0 / Platform Version 4
Server version - 1.22.0.4145. Same behaviour was also present on 1.21.4.4079.
I have only started to use collections in the last week.