Yes. The bug appears for all projectiles (throwable potions, egg, snowball, etc)
Yes. It is true for all blocks whose placing sound and destroying sound are the same, like gravel, dirt, wool, etc.
okay already fixed typo in the latest edit
there are several typos: ect-->etc; the a → delete “a”
Also, to better trigger this, you can go near to the dying mob
Note:
I don’t think my report is a duplicate to MCPE-234518.
MCPE-234518 states that the End Flash won’t be seen in Simple or Fancy grahpics.
But the issue of MCPE-234518 has already been fixed in 26.20.20 Preview.
My issue is that the End Flash won’t have a real lighting effect on the ambience.