Hello.

When the minecart passes over the activator rails
connected to the redstone signal, it throws the player out. If the activator rails are not connected to the redstone signal, the minecart passes without problems. The minecart throws out the player both in creative mode and in survival mode only with activator rails.

This problem was noticed on the previous version (before 1.17.40). Minecraft Bedrock.

I have to use powered rails instead of activator ones.