automatic nether portal issue.

hey Mojang, I'm sure  that you are familiar on how to make an automatic on & off nether portal. I've build one on Minecraft Bedrock on the Nintendo Switch. At first glance, it seems to work perfectly fine, but once I log back in after logging out, a obvious bug accrues. When I log back in, the dispenser with the water bucket is always activated breaking the off switch of the door. this issue really needs to be resolve because I really shouldn't need to fix the door every time I log back in.