It has become more frequent on my “Roku sound bar pro” than my “Roku stick” but when browsing through main menus, searches and apps, the Roku will partially load the screens display. Pictures will be fine but letters and number come in as blocks, or even just missing. Entire titles reduced to a single random letter of its entirety. I have done factory factory resets, reduced the main menu to less apps Incase it’s a cache or memory issue, ensured connectivity both plugged in and wireless with the router and to no avail, resolved the issue.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking "Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X