Extra space appears when the most recent message of the chat is selected and then unselected

[MasterK0927]

When we select a message containing media (If the message was last message in the chat) and unselect it, it introduces extra space between the input box and message.

My understanding
The scroll threshold value should reset to null when the most recent message in a chat is unselected. However, this reset is not happening, which results in extra space between the input area and the most recent message, leading to unexpected scroll behavior.

Steps to Reproduce:

• Open a chat and scroll to the bottom.
• Select the most recent message to set the scrollThreshold.
• Select and Unselect the most recent message.
• Observe the extra space between the input area and the most recent message, and note the unexpected scrolling behavior.

Operating System

• Pop OS 24.04 (based on Ubuntu)

[mattyg]

I searched the codebase for "scrollThreshold" but didn't find anything. Am I missing something, or can you link to the relevant code maybe?

[MasterK0927]

Apologies for not mentioning the full term earlier—it's related to the values SCROLL_BOTTOM_THRESHOLD and SCROLL_TOP_THRESHOLD. I believe they are relevant in this context.

[MasterK0927]

For reference please see this ss below

[mattyg]

Interesting, I'm not able to reproduce the issue following the steps:

Kazam_screencast_00000.mp4

Can you please note your OS in the description so it will be easier to investigate when we get to it? I'd also like to request that we rename the ticket to describe the problem you're seeing. Then note potential causes in the description, rather than starting with a proposed solution.

I don't think the right solution will be to set the SCROLL_BOTTOM_THRESHOLD to 0, since it is a constant for configuring the infinite scrolling.

Infinite scrolling is fiddly to get right, so I wouldn't be surprised if there are other bugs hiding in there as well. In general I'd be in favor of swapping out our code for a 3rd party library it if we find a good one.

[MasterK0927]

Updated the operating system.