[5.0.4 Beta 3] Neighbouring emojis Firefox weird behaviour

When there are two or more neighboring emojis (native or custom, doesn't matter) next to each other like this ☠️☹️❣️, there is some strange behavior on Firefox 136.

You cannot put cursor between them using keyboard.

1. When they are first thing on the line, you put cursor after them and attempt to use LEFT arrow to move cursor to the left, you cannot get between them or back to beginning of the line to add text before them

2. If there is some text before them, the cursor jumps over all of the emojis instead of moving one by one when using LEFT arrow

3. When you are on a line directly below some emojis that are next to each other, you cannot use UP arrow to go to the line above. It instead jumps to beginning of current line. The cursor needs to be below some text for it to work properly.

It seems to work fine on Chrome.